<?xml version="1.0" encoding="UTF-8"?>

<!--XBRL Document Created with Wdesk from Workiva-->
<!--Copyright 2023 Workiva-->
<!--r:b6e6a32c-9689-46ef-af07-fcbe1ca22588,g:80d9f478-a50b-482f-bfd8-d511a53a76cb-->
<link:linkbase xmlns:link="http://www.xbrl.org/2003/linkbase" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.xbrl.org/2003/linkbase http://www.xbrl.org/2003/xbrl-linkbase-2003-12-31.xsd">
  <link:roleRef roleURI="http://www.oxy.com/role/ConsolidatedBalanceSheets" xlink:type="simple" xlink:href="oxy-20221231.xsd#ConsolidatedBalanceSheets"/>
  <link:calculationLink xlink:role="http://www.oxy.com/role/ConsolidatedBalanceSheets" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LiabilitiesAndStockholdersEquity_871ead0c-d29d-4e34-bab5-aa2b27a6cb45" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_LiabilitiesAndStockholdersEquity"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LiabilitiesCurrent_b2fdc4ee-e563-43f2-8d42-2d026809058f" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_LiabilitiesCurrent"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_LiabilitiesAndStockholdersEquity_871ead0c-d29d-4e34-bab5-aa2b27a6cb45" xlink:to="loc_us-gaap_LiabilitiesCurrent_b2fdc4ee-e563-43f2-8d42-2d026809058f" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongTermDebtAndCapitalLeaseObligations_aa5fe532-76e2-4f07-87fb-d25600971a67" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_LongTermDebtAndCapitalLeaseObligations"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_LiabilitiesAndStockholdersEquity_871ead0c-d29d-4e34-bab5-aa2b27a6cb45" xlink:to="loc_us-gaap_LongTermDebtAndCapitalLeaseObligations_aa5fe532-76e2-4f07-87fb-d25600971a67" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredCreditsAndOtherLiabilitiesNoncurrent_2c838009-356b-417c-9e34-538113d70d79" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_DeferredCreditsAndOtherLiabilitiesNoncurrent"/>
    <link:calculationArc order="3" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_LiabilitiesAndStockholdersEquity_871ead0c-d29d-4e34-bab5-aa2b27a6cb45" xlink:to="loc_us-gaap_DeferredCreditsAndOtherLiabilitiesNoncurrent_2c838009-356b-417c-9e34-538113d70d79" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockholdersEquity_ad22dd64-092d-4dbd-ae03-438ebfbf7f1b" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_StockholdersEquity"/>
    <link:calculationArc order="4" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_LiabilitiesAndStockholdersEquity_871ead0c-d29d-4e34-bab5-aa2b27a6cb45" xlink:to="loc_us-gaap_StockholdersEquity_ad22dd64-092d-4dbd-ae03-438ebfbf7f1b" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredCreditsAndOtherLiabilitiesNoncurrent_04100476-61f7-44ed-91ca-52a48e23a570" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_DeferredCreditsAndOtherLiabilitiesNoncurrent"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredIncomeTaxLiabilitiesNet_08c5376c-aaa0-4e3b-8575-713b64177dd6" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_DeferredIncomeTaxLiabilitiesNet"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_DeferredCreditsAndOtherLiabilitiesNoncurrent_04100476-61f7-44ed-91ca-52a48e23a570" xlink:to="loc_us-gaap_DeferredIncomeTaxLiabilitiesNet_08c5376c-aaa0-4e3b-8575-713b64177dd6" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AssetRetirementObligationsNoncurrent_eea7ac55-a203-4536-9b54-2d6fc411dc8b" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_AssetRetirementObligationsNoncurrent"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_DeferredCreditsAndOtherLiabilitiesNoncurrent_04100476-61f7-44ed-91ca-52a48e23a570" xlink:to="loc_us-gaap_AssetRetirementObligationsNoncurrent_eea7ac55-a203-4536-9b54-2d6fc411dc8b" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccruedEnvironmentalLossContingenciesNoncurrent_8f8f9105-f83a-473f-9cca-28a7e3bdb79b" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_AccruedEnvironmentalLossContingenciesNoncurrent"/>
    <link:calculationArc order="3" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_DeferredCreditsAndOtherLiabilitiesNoncurrent_04100476-61f7-44ed-91ca-52a48e23a570" xlink:to="loc_us-gaap_AccruedEnvironmentalLossContingenciesNoncurrent_8f8f9105-f83a-473f-9cca-28a7e3bdb79b" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesNoncurrent_1b1151ee-4cd4-4457-bcc9-166f43471b57" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesNoncurrent"/>
    <link:calculationArc order="4" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_DeferredCreditsAndOtherLiabilitiesNoncurrent_04100476-61f7-44ed-91ca-52a48e23a570" xlink:to="loc_us-gaap_PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesNoncurrent_1b1151ee-4cd4-4457-bcc9-166f43471b57" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherLiabilitiesNoncurrent_69ee2e57-ea68-406f-af67-4ed0114e7839" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_OtherLiabilitiesNoncurrent"/>
    <link:calculationArc order="5" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_DeferredCreditsAndOtherLiabilitiesNoncurrent_04100476-61f7-44ed-91ca-52a48e23a570" xlink:to="loc_us-gaap_OtherLiabilitiesNoncurrent_69ee2e57-ea68-406f-af67-4ed0114e7839" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingLeaseLiabilityNoncurrent_7d9a9f5d-882e-4f93-872e-7d6c01d2fd0b" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_OperatingLeaseLiabilityNoncurrent"/>
    <link:calculationArc order="6" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_DeferredCreditsAndOtherLiabilitiesNoncurrent_04100476-61f7-44ed-91ca-52a48e23a570" xlink:to="loc_us-gaap_OperatingLeaseLiabilityNoncurrent_7d9a9f5d-882e-4f93-872e-7d6c01d2fd0b" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockholdersEquity_63386d2e-5415-4401-a369-420b16143db6" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_StockholdersEquity"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PreferredStockValue_10be991e-ee67-47cd-a21a-3433e9862f4d" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_PreferredStockValue"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_StockholdersEquity_63386d2e-5415-4401-a369-420b16143db6" xlink:to="loc_us-gaap_PreferredStockValue_10be991e-ee67-47cd-a21a-3433e9862f4d" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonStockValue_7a2a2c12-96b4-4dec-9536-55a4401218c3" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_CommonStockValue"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_StockholdersEquity_63386d2e-5415-4401-a369-420b16143db6" xlink:to="loc_us-gaap_CommonStockValue_7a2a2c12-96b4-4dec-9536-55a4401218c3" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TreasuryStockValue_2a43818a-399a-48bd-b2fd-16889f343c65" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_TreasuryStockValue"/>
    <link:calculationArc order="3" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_StockholdersEquity_63386d2e-5415-4401-a369-420b16143db6" xlink:to="loc_us-gaap_TreasuryStockValue_2a43818a-399a-48bd-b2fd-16889f343c65" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AdditionalPaidInCapitalCommonStock_95129045-c7cd-4edc-b950-8ac153634d47" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_AdditionalPaidInCapitalCommonStock"/>
    <link:calculationArc order="4" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_StockholdersEquity_63386d2e-5415-4401-a369-420b16143db6" xlink:to="loc_us-gaap_AdditionalPaidInCapitalCommonStock_95129045-c7cd-4edc-b950-8ac153634d47" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RetainedEarningsAccumulatedDeficit_00397763-a799-464d-9858-a8eabd9416fc" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_RetainedEarningsAccumulatedDeficit"/>
    <link:calculationArc order="5" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_StockholdersEquity_63386d2e-5415-4401-a369-420b16143db6" xlink:to="loc_us-gaap_RetainedEarningsAccumulatedDeficit_00397763-a799-464d-9858-a8eabd9416fc" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax_7f60b6da-6b82-435a-841c-016edf730b27" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax"/>
    <link:calculationArc order="6" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_StockholdersEquity_63386d2e-5415-4401-a369-420b16143db6" xlink:to="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax_7f60b6da-6b82-435a-841c-016edf730b27" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LiabilitiesCurrent_6f3707ae-0897-48bc-b041-d819002a9bea" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_LiabilitiesCurrent"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccountsPayableCurrent_9f2f67a4-9bb3-403b-8c7a-f7dc9d5a2ccb" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_AccountsPayableCurrent"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_LiabilitiesCurrent_6f3707ae-0897-48bc-b041-d819002a9bea" xlink:to="loc_us-gaap_AccountsPayableCurrent_9f2f67a4-9bb3-403b-8c7a-f7dc9d5a2ccb" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingLeaseLiabilityCurrent_90bc25f9-4ec6-45d1-bc6d-54cf4c3edb7d" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_OperatingLeaseLiabilityCurrent"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_LiabilitiesCurrent_6f3707ae-0897-48bc-b041-d819002a9bea" xlink:to="loc_us-gaap_OperatingLeaseLiabilityCurrent_90bc25f9-4ec6-45d1-bc6d-54cf4c3edb7d" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongTermDebtAndCapitalLeaseObligationsCurrent_eab1f182-b6e1-4864-99cc-84cb3680fdec" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_LongTermDebtAndCapitalLeaseObligationsCurrent"/>
    <link:calculationArc order="3" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_LiabilitiesCurrent_6f3707ae-0897-48bc-b041-d819002a9bea" xlink:to="loc_us-gaap_LongTermDebtAndCapitalLeaseObligationsCurrent_eab1f182-b6e1-4864-99cc-84cb3680fdec" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccruedLiabilitiesCurrent_e28a57bc-18e3-4841-88e5-01c7a7e32391" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_AccruedLiabilitiesCurrent"/>
    <link:calculationArc order="4" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_LiabilitiesCurrent_6f3707ae-0897-48bc-b041-d819002a9bea" xlink:to="loc_us-gaap_AccruedLiabilitiesCurrent_e28a57bc-18e3-4841-88e5-01c7a7e32391" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetAfterAccumulatedDepreciationAndAmortization_509b70d6-6058-4c3d-ad44-a99604a80cb3" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetAfterAccumulatedDepreciationAndAmortization"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetBeforeAccumulatedDepreciationAndAmortization_ac9454c7-43f8-4c04-b3b1-27e0b7a7f7ed" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetBeforeAccumulatedDepreciationAndAmortization"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetAfterAccumulatedDepreciationAndAmortization_509b70d6-6058-4c3d-ad44-a99604a80cb3" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetBeforeAccumulatedDepreciationAndAmortization_ac9454c7-43f8-4c04-b3b1-27e0b7a7f7ed" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetAccumulatedDepreciationAndAmortization_ffeb694a-e4d4-4a4e-adac-d2e5233aba6e" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetAccumulatedDepreciationAndAmortization"/>
    <link:calculationArc order="2" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetAfterAccumulatedDepreciationAndAmortization_509b70d6-6058-4c3d-ad44-a99604a80cb3" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetAccumulatedDepreciationAndAmortization_ffeb694a-e4d4-4a4e-adac-d2e5233aba6e" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_Assets_64bbbb5a-c0a9-4161-bd24-417cb9ed75f1" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_Assets"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AssetsCurrent_88c9b310-92f0-44dc-a610-f531a5ec6764" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_AssetsCurrent"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_Assets_64bbbb5a-c0a9-4161-bd24-417cb9ed75f1" xlink:to="loc_us-gaap_AssetsCurrent_88c9b310-92f0-44dc-a610-f531a5ec6764" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EquityMethodInvestments_f677466e-cb20-4640-8950-49e5c5ab0312" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_EquityMethodInvestments"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_Assets_64bbbb5a-c0a9-4161-bd24-417cb9ed75f1" xlink:to="loc_us-gaap_EquityMethodInvestments_f677466e-cb20-4640-8950-49e5c5ab0312" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetAfterAccumulatedDepreciationAndAmortization_ca2d063e-6572-4663-b1b4-6688dae5553c" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetAfterAccumulatedDepreciationAndAmortization"/>
    <link:calculationArc order="3" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_Assets_64bbbb5a-c0a9-4161-bd24-417cb9ed75f1" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetAfterAccumulatedDepreciationAndAmortization_ca2d063e-6572-4663-b1b4-6688dae5553c" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_oxy_LongTermReceivablesAndOtherNoncurrentAssetsNet_b8866857-452d-44f8-b64e-fe367ca05b19" xlink:href="oxy-20221231.xsd#oxy_LongTermReceivablesAndOtherNoncurrentAssetsNet"/>
    <link:calculationArc order="4" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_Assets_64bbbb5a-c0a9-4161-bd24-417cb9ed75f1" xlink:to="loc_oxy_LongTermReceivablesAndOtherNoncurrentAssetsNet_b8866857-452d-44f8-b64e-fe367ca05b19" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingLeaseRightOfUseAsset_85ac3b96-cd52-4fa4-a71b-191e50db7882" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_OperatingLeaseRightOfUseAsset"/>
    <link:calculationArc order="5" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_Assets_64bbbb5a-c0a9-4161-bd24-417cb9ed75f1" xlink:to="loc_us-gaap_OperatingLeaseRightOfUseAsset_85ac3b96-cd52-4fa4-a71b-191e50db7882" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AssetsCurrent_dd2216f8-f64c-43e4-a272-e4c04ef1147f" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_AssetsCurrent"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherAssetsCurrent_a4bf960c-ebfa-4bb4-92c9-e5ae328631ee" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_OtherAssetsCurrent"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_AssetsCurrent_dd2216f8-f64c-43e4-a272-e4c04ef1147f" xlink:to="loc_us-gaap_OtherAssetsCurrent_a4bf960c-ebfa-4bb4-92c9-e5ae328631ee" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InventoryNet_57085515-44a7-472e-aecf-2cb16c063bc7" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_InventoryNet"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_AssetsCurrent_dd2216f8-f64c-43e4-a272-e4c04ef1147f" xlink:to="loc_us-gaap_InventoryNet_57085515-44a7-472e-aecf-2cb16c063bc7" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccountsReceivableNetCurrent_e01959e4-fee8-4b5e-a465-cf712f450a45" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_AccountsReceivableNetCurrent"/>
    <link:calculationArc order="3" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_AssetsCurrent_dd2216f8-f64c-43e4-a272-e4c04ef1147f" xlink:to="loc_us-gaap_AccountsReceivableNetCurrent_e01959e4-fee8-4b5e-a465-cf712f450a45" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CashAndCashEquivalentsAtCarryingValue_4859325d-df5c-4641-a76b-ef8787580377" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_CashAndCashEquivalentsAtCarryingValue"/>
    <link:calculationArc order="4" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_AssetsCurrent_dd2216f8-f64c-43e4-a272-e4c04ef1147f" xlink:to="loc_us-gaap_CashAndCashEquivalentsAtCarryingValue_4859325d-df5c-4641-a76b-ef8787580377" xlink:type="arc"/>
  </link:calculationLink>
  <link:roleRef roleURI="http://www.oxy.com/role/ConsolidatedStatementsofOperations" xlink:type="simple" xlink:href="oxy-20221231.xsd#ConsolidatedStatementsofOperations"/>
  <link:calculationLink xlink:role="http://www.oxy.com/role/ConsolidatedStatementsofOperations" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_oxy_CostsAndOtherDeductions_838b9924-1d45-482e-bebd-d466cbdce2e5" xlink:href="oxy-20221231.xsd#oxy_CostsAndOtherDeductions"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ResultsOfOperationsExpenseFromOilAndGasProducingActivities_fb426b05-3ea6-4048-997b-b9c77ce813a8" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ResultsOfOperationsExpenseFromOilAndGasProducingActivities"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_oxy_CostsAndOtherDeductions_838b9924-1d45-482e-bebd-d466cbdce2e5" xlink:to="loc_us-gaap_ResultsOfOperationsExpenseFromOilAndGasProducingActivities_fb426b05-3ea6-4048-997b-b9c77ce813a8" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_oxy_TransportationAndGatheringExpense_47c5911a-6450-42c1-8856-5c7b148bc919" xlink:href="oxy-20221231.xsd#oxy_TransportationAndGatheringExpense"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_oxy_CostsAndOtherDeductions_838b9924-1d45-482e-bebd-d466cbdce2e5" xlink:to="loc_oxy_TransportationAndGatheringExpense_47c5911a-6450-42c1-8856-5c7b148bc919" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CostOfGoodsAndServicesSold_0fe6e01c-83d1-4917-9991-dd4b6b0e4a9f" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_CostOfGoodsAndServicesSold"/>
    <link:calculationArc order="3" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_oxy_CostsAndOtherDeductions_838b9924-1d45-482e-bebd-d466cbdce2e5" xlink:to="loc_us-gaap_CostOfGoodsAndServicesSold_0fe6e01c-83d1-4917-9991-dd4b6b0e4a9f" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_oxy_PurchasedCommodities_5c04b2e2-d043-4fbe-bd7a-dcb93d0ec313" xlink:href="oxy-20221231.xsd#oxy_PurchasedCommodities"/>
    <link:calculationArc order="4" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_oxy_CostsAndOtherDeductions_838b9924-1d45-482e-bebd-d466cbdce2e5" xlink:to="loc_oxy_PurchasedCommodities_5c04b2e2-d043-4fbe-bd7a-dcb93d0ec313" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SellingGeneralAndAdministrativeExpense_613e46b7-dafc-4724-bc87-fc7fc9a4a145" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_SellingGeneralAndAdministrativeExpense"/>
    <link:calculationArc order="5" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_oxy_CostsAndOtherDeductions_838b9924-1d45-482e-bebd-d466cbdce2e5" xlink:to="loc_us-gaap_SellingGeneralAndAdministrativeExpense_613e46b7-dafc-4724-bc87-fc7fc9a4a145" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherCostAndExpenseOperating_dc0f3707-9acb-41f8-99fe-e6cab957fb10" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_OtherCostAndExpenseOperating"/>
    <link:calculationArc order="6" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_oxy_CostsAndOtherDeductions_838b9924-1d45-482e-bebd-d466cbdce2e5" xlink:to="loc_us-gaap_OtherCostAndExpenseOperating_dc0f3707-9acb-41f8-99fe-e6cab957fb10" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TaxesExcludingIncomeAndExciseTaxes_d2c2a96f-1f7b-4170-8263-6405ed2b4003" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_TaxesExcludingIncomeAndExciseTaxes"/>
    <link:calculationArc order="7" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_oxy_CostsAndOtherDeductions_838b9924-1d45-482e-bebd-d466cbdce2e5" xlink:to="loc_us-gaap_TaxesExcludingIncomeAndExciseTaxes_d2c2a96f-1f7b-4170-8263-6405ed2b4003" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DepreciationDepletionAndAmortization_11855473-2d25-42c3-9d44-9c4b6f488de2" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_DepreciationDepletionAndAmortization"/>
    <link:calculationArc order="8" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_oxy_CostsAndOtherDeductions_838b9924-1d45-482e-bebd-d466cbdce2e5" xlink:to="loc_us-gaap_DepreciationDepletionAndAmortization_11855473-2d25-42c3-9d44-9c4b6f488de2" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_oxy_PretaxAssetImpairmentAndRelatedItems_fa9819a7-ee44-45be-bd6d-a0bfb9a2faee" xlink:href="oxy-20221231.xsd#oxy_PretaxAssetImpairmentAndRelatedItems"/>
    <link:calculationArc order="9" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_oxy_CostsAndOtherDeductions_838b9924-1d45-482e-bebd-d466cbdce2e5" xlink:to="loc_oxy_PretaxAssetImpairmentAndRelatedItems_fa9819a7-ee44-45be-bd6d-a0bfb9a2faee" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessCombinationAcquisitionRelatedCosts_ad0bce9d-6469-4e8e-b5bd-b8feb938f60c" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_BusinessCombinationAcquisitionRelatedCosts"/>
    <link:calculationArc order="10" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_oxy_CostsAndOtherDeductions_838b9924-1d45-482e-bebd-d466cbdce2e5" xlink:to="loc_us-gaap_BusinessCombinationAcquisitionRelatedCosts_ad0bce9d-6469-4e8e-b5bd-b8feb938f60c" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ExplorationExpense_a68f5299-1b63-41c3-8ebe-7338308ddf05" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ExplorationExpense"/>
    <link:calculationArc order="11" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_oxy_CostsAndOtherDeductions_838b9924-1d45-482e-bebd-d466cbdce2e5" xlink:to="loc_us-gaap_ExplorationExpense_a68f5299-1b63-41c3-8ebe-7338308ddf05" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InterestAndDebtExpense_47e9fa39-c78a-439e-8bbb-dc53922791a7" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_InterestAndDebtExpense"/>
    <link:calculationArc order="12" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_oxy_CostsAndOtherDeductions_838b9924-1d45-482e-bebd-d466cbdce2e5" xlink:to="loc_us-gaap_InterestAndDebtExpense_47e9fa39-c78a-439e-8bbb-dc53922791a7" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest_ac18e97d-f099-40f1-8f32-050bbf327f97" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NonoperatingIncomeExpense_f0829e08-2688-4add-901a-e14e0ffe9b6b" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_NonoperatingIncomeExpense"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest_ac18e97d-f099-40f1-8f32-050bbf327f97" xlink:to="loc_us-gaap_NonoperatingIncomeExpense_f0829e08-2688-4add-901a-e14e0ffe9b6b" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_oxy_IncomeLossFromContinuingOperationsBeforeNonoperatingIncomeExpenseEquityMethodInvestmentsIncomeTaxesNoncontrollingInterest_e3481a07-9f5c-401c-9e31-fcbe0eca3d10" xlink:href="oxy-20221231.xsd#oxy_IncomeLossFromContinuingOperationsBeforeNonoperatingIncomeExpenseEquityMethodInvestmentsIncomeTaxesNoncontrollingInterest"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest_ac18e97d-f099-40f1-8f32-050bbf327f97" xlink:to="loc_oxy_IncomeLossFromContinuingOperationsBeforeNonoperatingIncomeExpenseEquityMethodInvestmentsIncomeTaxesNoncontrollingInterest_e3481a07-9f5c-401c-9e31-fcbe0eca3d10" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NonoperatingIncomeExpense_2c7efddf-77ec-47e5-bc25-8925560b970c" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_NonoperatingIncomeExpense"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_GainLossOnDerivativeInstrumentsNetPretax_1e087047-67ee-4cbd-8911-804f09a41c19" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_GainLossOnDerivativeInstrumentsNetPretax"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NonoperatingIncomeExpense_2c7efddf-77ec-47e5-bc25-8925560b970c" xlink:to="loc_us-gaap_GainLossOnDerivativeInstrumentsNetPretax_1e087047-67ee-4cbd-8911-804f09a41c19" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeLossFromEquityMethodInvestments_a891bc34-4c74-4726-8ac3-2a7c58056933" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_IncomeLossFromEquityMethodInvestments"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NonoperatingIncomeExpense_2c7efddf-77ec-47e5-bc25-8925560b970c" xlink:to="loc_us-gaap_IncomeLossFromEquityMethodInvestments_a891bc34-4c74-4726-8ac3-2a7c58056933" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_oxy_IncomeLossFromContinuingOperationsBeforeNonoperatingIncomeExpenseEquityMethodInvestmentsIncomeTaxesNoncontrollingInterest_80ca3e70-bb0b-4182-9f13-77f900ecd96a" xlink:href="oxy-20221231.xsd#oxy_IncomeLossFromContinuingOperationsBeforeNonoperatingIncomeExpenseEquityMethodInvestmentsIncomeTaxesNoncontrollingInterest"/>
    <link:loc xlink:type="locator" xlink:label="loc_oxy_RevenuesOperatingAndNonoperating_2f544d26-0054-42da-bb95-c8b161646288" xlink:href="oxy-20221231.xsd#oxy_RevenuesOperatingAndNonoperating"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_oxy_IncomeLossFromContinuingOperationsBeforeNonoperatingIncomeExpenseEquityMethodInvestmentsIncomeTaxesNoncontrollingInterest_80ca3e70-bb0b-4182-9f13-77f900ecd96a" xlink:to="loc_oxy_RevenuesOperatingAndNonoperating_2f544d26-0054-42da-bb95-c8b161646288" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_oxy_CostsAndOtherDeductions_80b751fe-3515-4bfe-85ac-3a144640cad3" xlink:href="oxy-20221231.xsd#oxy_CostsAndOtherDeductions"/>
    <link:calculationArc order="2" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_oxy_IncomeLossFromContinuingOperationsBeforeNonoperatingIncomeExpenseEquityMethodInvestmentsIncomeTaxesNoncontrollingInterest_80ca3e70-bb0b-4182-9f13-77f900ecd96a" xlink:to="loc_oxy_CostsAndOtherDeductions_80b751fe-3515-4bfe-85ac-3a144640cad3" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EarningsPerShareDiluted_d0d12feb-1ae1-4fc0-9dd6-5767ad380a0a" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_EarningsPerShareDiluted"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeLossFromContinuingOperationsPerDilutedShare_b9db3e6f-41e0-4310-b694-bb4f0d44dcd9" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_IncomeLossFromContinuingOperationsPerDilutedShare"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_EarningsPerShareDiluted_d0d12feb-1ae1-4fc0-9dd6-5767ad380a0a" xlink:to="loc_us-gaap_IncomeLossFromContinuingOperationsPerDilutedShare_b9db3e6f-41e0-4310-b694-bb4f0d44dcd9" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DiscontinuedOperationIncomeLossFromDiscontinuedOperationNetOfTaxPerDilutedShare_d8c75f5f-7b5e-4e4f-b77c-92c9de8a7627" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_DiscontinuedOperationIncomeLossFromDiscontinuedOperationNetOfTaxPerDilutedShare"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_EarningsPerShareDiluted_d0d12feb-1ae1-4fc0-9dd6-5767ad380a0a" xlink:to="loc_us-gaap_DiscontinuedOperationIncomeLossFromDiscontinuedOperationNetOfTaxPerDilutedShare_d8c75f5f-7b5e-4e4f-b77c-92c9de8a7627" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_oxy_NetIncomeLossAttributableToCommonStockholders_53d94e80-9df5-4965-b591-744056106fc1" xlink:href="oxy-20221231.xsd#oxy_NetIncomeLossAttributableToCommonStockholders"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetIncomeLoss_fc247ecf-948c-4e23-8aca-45ad171929ef" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_NetIncomeLoss"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_oxy_NetIncomeLossAttributableToCommonStockholders_53d94e80-9df5-4965-b591-744056106fc1" xlink:to="loc_us-gaap_NetIncomeLoss_fc247ecf-948c-4e23-8aca-45ad171929ef" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PreferredStockDividendsAndOtherAdjustments_120c5a7d-ba6a-41be-9d54-1270b3f0858a" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_PreferredStockDividendsAndOtherAdjustments"/>
    <link:calculationArc order="2" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_oxy_NetIncomeLossAttributableToCommonStockholders_53d94e80-9df5-4965-b591-744056106fc1" xlink:to="loc_us-gaap_PreferredStockDividendsAndOtherAdjustments_120c5a7d-ba6a-41be-9d54-1270b3f0858a" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetIncomeLoss_686b1259-872d-4b58-8ef5-fd59b71cc533" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_NetIncomeLoss"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest_29ed22a8-c683-4338-a2bd-b441b83d77bb" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetIncomeLoss_686b1259-872d-4b58-8ef5-fd59b71cc533" xlink:to="loc_us-gaap_IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest_29ed22a8-c683-4338-a2bd-b441b83d77bb" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTax_35cefbdd-9276-45eb-afc5-2a8959cf48b3" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTax"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetIncomeLoss_686b1259-872d-4b58-8ef5-fd59b71cc533" xlink:to="loc_us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTax_35cefbdd-9276-45eb-afc5-2a8959cf48b3" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EarningsPerShareBasic_2f22a3e4-2560-4f92-833f-9317368a6b43" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_EarningsPerShareBasic"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeLossFromContinuingOperationsPerBasicShare_2acdd1cb-d6e0-4343-9e69-62552e54c9e2" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_IncomeLossFromContinuingOperationsPerBasicShare"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_EarningsPerShareBasic_2f22a3e4-2560-4f92-833f-9317368a6b43" xlink:to="loc_us-gaap_IncomeLossFromContinuingOperationsPerBasicShare_2acdd1cb-d6e0-4343-9e69-62552e54c9e2" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DiscontinuedOperationIncomeLossFromDiscontinuedOperationNetOfTaxPerBasicShare_4b57db85-2edb-408a-aaf7-b94ee31f0588" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_DiscontinuedOperationIncomeLossFromDiscontinuedOperationNetOfTaxPerBasicShare"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_EarningsPerShareBasic_2f22a3e4-2560-4f92-833f-9317368a6b43" xlink:to="loc_us-gaap_DiscontinuedOperationIncomeLossFromDiscontinuedOperationNetOfTaxPerBasicShare_4b57db85-2edb-408a-aaf7-b94ee31f0588" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_oxy_RevenuesOperatingAndNonoperating_f6906cd4-1a67-4e8c-95be-c70ec959f202" xlink:href="oxy-20221231.xsd#oxy_RevenuesOperatingAndNonoperating"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_Revenues_7bfd4e01-654a-4088-a0db-fc0752209fc6" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_Revenues"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_oxy_RevenuesOperatingAndNonoperating_f6906cd4-1a67-4e8c-95be-c70ec959f202" xlink:to="loc_us-gaap_Revenues_7bfd4e01-654a-4088-a0db-fc0752209fc6" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_oxy_InterestDividendsAndOtherIncome_5a01d5c6-9f1e-4a9f-90da-6a676c6bc5a3" xlink:href="oxy-20221231.xsd#oxy_InterestDividendsAndOtherIncome"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_oxy_RevenuesOperatingAndNonoperating_f6906cd4-1a67-4e8c-95be-c70ec959f202" xlink:to="loc_oxy_InterestDividendsAndOtherIncome_5a01d5c6-9f1e-4a9f-90da-6a676c6bc5a3" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_oxy_GainsOnSaleOfEquityInvestmentsAndOtherAssets_def1de1b-07c2-4687-be72-87ca441472fd" xlink:href="oxy-20221231.xsd#oxy_GainsOnSaleOfEquityInvestmentsAndOtherAssets"/>
    <link:calculationArc order="3" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_oxy_RevenuesOperatingAndNonoperating_f6906cd4-1a67-4e8c-95be-c70ec959f202" xlink:to="loc_oxy_GainsOnSaleOfEquityInvestmentsAndOtherAssets_def1de1b-07c2-4687-be72-87ca441472fd" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest_8d63bf1f-7ef7-4940-9097-f632872955ec" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest_fbf196fb-bc63-4611-a363-511949b7cb5d" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest_8d63bf1f-7ef7-4940-9097-f632872955ec" xlink:to="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest_fbf196fb-bc63-4611-a363-511949b7cb5d" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeTaxExpenseBenefit_e70647cc-46d5-4d4e-b35a-1c8a10c35313" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_IncomeTaxExpenseBenefit"/>
    <link:calculationArc order="2" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest_8d63bf1f-7ef7-4940-9097-f632872955ec" xlink:to="loc_us-gaap_IncomeTaxExpenseBenefit_e70647cc-46d5-4d4e-b35a-1c8a10c35313" xlink:type="arc"/>
  </link:calculationLink>
  <link:roleRef roleURI="http://www.oxy.com/role/ConsolidatedStatementsofComprehensiveIncomeLoss" xlink:type="simple" xlink:href="oxy-20221231.xsd#ConsolidatedStatementsofComprehensiveIncomeLoss"/>
  <link:calculationLink xlink:role="http://www.oxy.com/role/ConsolidatedStatementsofComprehensiveIncomeLoss" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossNetOfTax_743d7d5f-04de-4ee0-8e8b-4ab9240894a3" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_OtherComprehensiveIncomeLossNetOfTax"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationAfterTax_7a08aa88-d3fe-4ff9-8b0b-34d310002dba" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationAfterTax"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_OtherComprehensiveIncomeLossNetOfTax_743d7d5f-04de-4ee0-8e8b-4ab9240894a3" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationAfterTax_7a08aa88-d3fe-4ff9-8b0b-34d310002dba" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherComprehensiveIncomeDefinedBenefitPlansNetUnamortizedGainLossArisingDuringPeriodNetOfTax_9258425e-d094-42fc-8bdd-2c7c600fe66d" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_OtherComprehensiveIncomeDefinedBenefitPlansNetUnamortizedGainLossArisingDuringPeriodNetOfTax"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_OtherComprehensiveIncomeLossNetOfTax_743d7d5f-04de-4ee0-8e8b-4ab9240894a3" xlink:to="loc_us-gaap_OtherComprehensiveIncomeDefinedBenefitPlansNetUnamortizedGainLossArisingDuringPeriodNetOfTax_9258425e-d094-42fc-8bdd-2c7c600fe66d" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationAfterTax_1f2f2935-e878-41f3-b059-cdd88fcf59d2" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationAfterTax"/>
    <link:calculationArc order="3" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_OtherComprehensiveIncomeLossNetOfTax_743d7d5f-04de-4ee0-8e8b-4ab9240894a3" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationAfterTax_1f2f2935-e878-41f3-b059-cdd88fcf59d2" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ComprehensiveIncomeNetOfTax_80ea81cc-5914-4ad4-b72c-50297ffad4de" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ComprehensiveIncomeNetOfTax"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossNetOfTax_7e7e5ac5-8dd3-4599-af50-74f017d4e018" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_OtherComprehensiveIncomeLossNetOfTax"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_ComprehensiveIncomeNetOfTax_80ea81cc-5914-4ad4-b72c-50297ffad4de" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLossNetOfTax_7e7e5ac5-8dd3-4599-af50-74f017d4e018" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetIncomeLoss_9c17dac2-8b89-430c-8cdc-ab476e758983" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_NetIncomeLoss"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_ComprehensiveIncomeNetOfTax_80ea81cc-5914-4ad4-b72c-50297ffad4de" xlink:to="loc_us-gaap_NetIncomeLoss_9c17dac2-8b89-430c-8cdc-ab476e758983" xlink:type="arc"/>
  </link:calculationLink>
  <link:roleRef roleURI="http://www.oxy.com/role/ConsolidatedStatementsofCashFlows" xlink:type="simple" xlink:href="oxy-20221231.xsd#ConsolidatedStatementsofCashFlows"/>
  <link:calculationLink xlink:role="http://www.oxy.com/role/ConsolidatedStatementsofCashFlows" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetCashProvidedByUsedInInvestingActivitiesContinuingOperations_51d42c58-95c4-462a-9595-237acc5fdff9" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_NetCashProvidedByUsedInInvestingActivitiesContinuingOperations"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PaymentsToAcquirePropertyPlantAndEquipment_f7a67de6-5a8f-4e92-bfc0-8d6546bc1c16" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_PaymentsToAcquirePropertyPlantAndEquipment"/>
    <link:calculationArc order="1" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInInvestingActivitiesContinuingOperations_51d42c58-95c4-462a-9595-237acc5fdff9" xlink:to="loc_us-gaap_PaymentsToAcquirePropertyPlantAndEquipment_f7a67de6-5a8f-4e92-bfc0-8d6546bc1c16" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_oxy_IncreaseDecreaseInCapitalAccrual_b2c448a9-da42-44e6-a14a-167d3b8966e1" xlink:href="oxy-20221231.xsd#oxy_IncreaseDecreaseInCapitalAccrual"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInInvestingActivitiesContinuingOperations_51d42c58-95c4-462a-9595-237acc5fdff9" xlink:to="loc_oxy_IncreaseDecreaseInCapitalAccrual_b2c448a9-da42-44e6-a14a-167d3b8966e1" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_oxy_PaymentsForPurchasesOfAssetsBusinessesAndEquityInvestments_d8a77602-2ee9-4622-a720-463022cb85c3" xlink:href="oxy-20221231.xsd#oxy_PaymentsForPurchasesOfAssetsBusinessesAndEquityInvestments"/>
    <link:calculationArc order="3" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInInvestingActivitiesContinuingOperations_51d42c58-95c4-462a-9595-237acc5fdff9" xlink:to="loc_oxy_PaymentsForPurchasesOfAssetsBusinessesAndEquityInvestments_d8a77602-2ee9-4622-a720-463022cb85c3" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_oxy_ProceedsFromSaleOfAssetsAndEquityInvestmentsNet_8ac4d0df-8cdd-4ab6-a800-5fed232e03ca" xlink:href="oxy-20221231.xsd#oxy_ProceedsFromSaleOfAssetsAndEquityInvestmentsNet"/>
    <link:calculationArc order="4" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInInvestingActivitiesContinuingOperations_51d42c58-95c4-462a-9595-237acc5fdff9" xlink:to="loc_oxy_ProceedsFromSaleOfAssetsAndEquityInvestmentsNet_8ac4d0df-8cdd-4ab6-a800-5fed232e03ca" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_oxy_PaymentsForProceedsFromEquityInvestmentsAndOtherNet_f1393282-1d00-4749-a6a6-10dd90a8a31b" xlink:href="oxy-20221231.xsd#oxy_PaymentsForProceedsFromEquityInvestmentsAndOtherNet"/>
    <link:calculationArc order="5" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInInvestingActivitiesContinuingOperations_51d42c58-95c4-462a-9595-237acc5fdff9" xlink:to="loc_oxy_PaymentsForProceedsFromEquityInvestmentsAndOtherNet_f1393282-1d00-4749-a6a6-10dd90a8a31b" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetCashProvidedByUsedInFinancingActivities_f786c04b-8676-45cb-8152-08ec0b6b5ef1" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_NetCashProvidedByUsedInFinancingActivities"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetCashProvidedByUsedInFinancingActivitiesContinuingOperations_e444bb9b-b1a3-4ea8-94f3-0d06513fc7b4" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_NetCashProvidedByUsedInFinancingActivitiesContinuingOperations"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivities_f786c04b-8676-45cb-8152-08ec0b6b5ef1" xlink:to="loc_us-gaap_NetCashProvidedByUsedInFinancingActivitiesContinuingOperations_e444bb9b-b1a3-4ea8-94f3-0d06513fc7b4" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CashProvidedByUsedInFinancingActivitiesDiscontinuedOperations_71091a33-d491-4eda-bf85-49fc87f5e577" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_CashProvidedByUsedInFinancingActivitiesDiscontinuedOperations"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivities_f786c04b-8676-45cb-8152-08ec0b6b5ef1" xlink:to="loc_us-gaap_CashProvidedByUsedInFinancingActivitiesDiscontinuedOperations_71091a33-d491-4eda-bf85-49fc87f5e577" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetCashProvidedByUsedInOperatingActivitiesContinuingOperations_0d996e5e-0a67-405a-a90a-e64f7a5cf627" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_NetCashProvidedByUsedInOperatingActivitiesContinuingOperations"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetIncomeLoss_f177dba1-8ca2-4467-a8d6-c5379f87310c" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_NetIncomeLoss"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivitiesContinuingOperations_0d996e5e-0a67-405a-a90a-e64f7a5cf627" xlink:to="loc_us-gaap_NetIncomeLoss_f177dba1-8ca2-4467-a8d6-c5379f87310c" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DepreciationDepletionAndAmortization_c284d4f3-c231-4731-b5a9-1131e6930720" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_DepreciationDepletionAndAmortization"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivitiesContinuingOperations_0d996e5e-0a67-405a-a90a-e64f7a5cf627" xlink:to="loc_us-gaap_DepreciationDepletionAndAmortization_c284d4f3-c231-4731-b5a9-1131e6930720" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeLossFromEquityMethodInvestmentsNetOfDividendsOrDistributions_ad2e956e-de10-47e1-a0f2-dfcfa6ba1061" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_IncomeLossFromEquityMethodInvestmentsNetOfDividendsOrDistributions"/>
    <link:calculationArc order="3" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivitiesContinuingOperations_0d996e5e-0a67-405a-a90a-e64f7a5cf627" xlink:to="loc_us-gaap_IncomeLossFromEquityMethodInvestmentsNetOfDividendsOrDistributions_ad2e956e-de10-47e1-a0f2-dfcfa6ba1061" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredIncomeTaxExpenseBenefit_f4fc5822-19a9-4ebf-9748-1d4b95163891" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_DeferredIncomeTaxExpenseBenefit"/>
    <link:calculationArc order="4" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivitiesContinuingOperations_0d996e5e-0a67-405a-a90a-e64f7a5cf627" xlink:to="loc_us-gaap_DeferredIncomeTaxExpenseBenefit_f4fc5822-19a9-4ebf-9748-1d4b95163891" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherNoncashIncomeExpense_5016fb65-ecdc-44c0-9783-a92029e9fad0" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_OtherNoncashIncomeExpense"/>
    <link:calculationArc order="5" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivitiesContinuingOperations_0d996e5e-0a67-405a-a90a-e64f7a5cf627" xlink:to="loc_us-gaap_OtherNoncashIncomeExpense_5016fb65-ecdc-44c0-9783-a92029e9fad0" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_oxy_NonCashPortionOfAssetImpairmentAndRelatedItems_e8bc2085-976d-4f39-8738-2b489cf55020" xlink:href="oxy-20221231.xsd#oxy_NonCashPortionOfAssetImpairmentAndRelatedItems"/>
    <link:calculationArc order="6" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivitiesContinuingOperations_0d996e5e-0a67-405a-a90a-e64f7a5cf627" xlink:to="loc_oxy_NonCashPortionOfAssetImpairmentAndRelatedItems_e8bc2085-976d-4f39-8738-2b489cf55020" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_oxy_GainsOnSaleOfEquityInvestmentsAndOtherAssets_0983993e-71a0-4bdc-a283-0a960b310080" xlink:href="oxy-20221231.xsd#oxy_GainsOnSaleOfEquityInvestmentsAndOtherAssets"/>
    <link:calculationArc order="7" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivitiesContinuingOperations_0d996e5e-0a67-405a-a90a-e64f7a5cf627" xlink:to="loc_oxy_GainsOnSaleOfEquityInvestmentsAndOtherAssets_0983993e-71a0-4bdc-a283-0a960b310080" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ExplorationAbandonmentAndImpairmentExpense_e5e52c14-4e76-4c41-9f6f-dc149884e137" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ExplorationAbandonmentAndImpairmentExpense"/>
    <link:calculationArc order="8" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivitiesContinuingOperations_0d996e5e-0a67-405a-a90a-e64f7a5cf627" xlink:to="loc_us-gaap_ExplorationAbandonmentAndImpairmentExpense_e5e52c14-4e76-4c41-9f6f-dc149884e137" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncreaseDecreaseInReceivables_46cfbfad-9a9e-4155-ab7e-71ba1d996661" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_IncreaseDecreaseInReceivables"/>
    <link:calculationArc order="9" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivitiesContinuingOperations_0d996e5e-0a67-405a-a90a-e64f7a5cf627" xlink:to="loc_us-gaap_IncreaseDecreaseInReceivables_46cfbfad-9a9e-4155-ab7e-71ba1d996661" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncreaseDecreaseInInventories_457e80aa-a520-4eaf-96d6-46cf6902b42e" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_IncreaseDecreaseInInventories"/>
    <link:calculationArc order="10" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivitiesContinuingOperations_0d996e5e-0a67-405a-a90a-e64f7a5cf627" xlink:to="loc_us-gaap_IncreaseDecreaseInInventories_457e80aa-a520-4eaf-96d6-46cf6902b42e" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncreaseDecreaseInOtherCurrentAssets_442459fc-ae45-4ec7-a506-cc9fd7d6ef65" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_IncreaseDecreaseInOtherCurrentAssets"/>
    <link:calculationArc order="11" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivitiesContinuingOperations_0d996e5e-0a67-405a-a90a-e64f7a5cf627" xlink:to="loc_us-gaap_IncreaseDecreaseInOtherCurrentAssets_442459fc-ae45-4ec7-a506-cc9fd7d6ef65" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncreaseDecreaseInAccountsPayableAndAccruedLiabilities_e7f3d63b-c541-4c1c-89eb-738135dadb2a" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_IncreaseDecreaseInAccountsPayableAndAccruedLiabilities"/>
    <link:calculationArc order="12" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivitiesContinuingOperations_0d996e5e-0a67-405a-a90a-e64f7a5cf627" xlink:to="loc_us-gaap_IncreaseDecreaseInAccountsPayableAndAccruedLiabilities_e7f3d63b-c541-4c1c-89eb-738135dadb2a" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncreaseDecreaseInAccruedIncomeTaxesPayable_80632121-b37a-4a09-bcda-c11e841436af" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_IncreaseDecreaseInAccruedIncomeTaxesPayable"/>
    <link:calculationArc order="13" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivitiesContinuingOperations_0d996e5e-0a67-405a-a90a-e64f7a5cf627" xlink:to="loc_us-gaap_IncreaseDecreaseInAccruedIncomeTaxesPayable_80632121-b37a-4a09-bcda-c11e841436af" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DiscontinuedOperationGainLossOnDisposalOfDiscontinuedOperationNetOfTax_308bb366-78e5-40bc-87ca-39886f2b8fe2" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_DiscontinuedOperationGainLossOnDisposalOfDiscontinuedOperationNetOfTax"/>
    <link:calculationArc order="14" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivitiesContinuingOperations_0d996e5e-0a67-405a-a90a-e64f7a5cf627" xlink:to="loc_us-gaap_DiscontinuedOperationGainLossOnDisposalOfDiscontinuedOperationNetOfTax_308bb366-78e5-40bc-87ca-39886f2b8fe2" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect_13d8c63e-7709-465a-a1e8-33ae43cd8e44" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_20754788-4760-48ee-ba83-8789b46dfdf3" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_NetCashProvidedByUsedInOperatingActivities"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect_13d8c63e-7709-465a-a1e8-33ae43cd8e44" xlink:to="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_20754788-4760-48ee-ba83-8789b46dfdf3" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetCashProvidedByUsedInInvestingActivities_d5505238-8462-4d7a-9c11-1a6b812745e4" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_NetCashProvidedByUsedInInvestingActivities"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect_13d8c63e-7709-465a-a1e8-33ae43cd8e44" xlink:to="loc_us-gaap_NetCashProvidedByUsedInInvestingActivities_d5505238-8462-4d7a-9c11-1a6b812745e4" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetCashProvidedByUsedInFinancingActivities_39f6d6ac-eed7-4a0e-a37e-745783c0c4dd" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_NetCashProvidedByUsedInFinancingActivities"/>
    <link:calculationArc order="3" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect_13d8c63e-7709-465a-a1e8-33ae43cd8e44" xlink:to="loc_us-gaap_NetCashProvidedByUsedInFinancingActivities_39f6d6ac-eed7-4a0e-a37e-745783c0c4dd" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetCashProvidedByUsedInInvestingActivities_0d18b7ac-eee4-4a37-9e8e-29802e958c3f" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_NetCashProvidedByUsedInInvestingActivities"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetCashProvidedByUsedInInvestingActivitiesContinuingOperations_072a88b0-4399-4272-8f94-45fb8235f337" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_NetCashProvidedByUsedInInvestingActivitiesContinuingOperations"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInInvestingActivities_0d18b7ac-eee4-4a37-9e8e-29802e958c3f" xlink:to="loc_us-gaap_NetCashProvidedByUsedInInvestingActivitiesContinuingOperations_072a88b0-4399-4272-8f94-45fb8235f337" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CashProvidedByUsedInInvestingActivitiesDiscontinuedOperations_76878b11-2f37-4a1d-8d58-094cb8233ddc" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_CashProvidedByUsedInInvestingActivitiesDiscontinuedOperations"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInInvestingActivities_0d18b7ac-eee4-4a37-9e8e-29802e958c3f" xlink:to="loc_us-gaap_CashProvidedByUsedInInvestingActivitiesDiscontinuedOperations_76878b11-2f37-4a1d-8d58-094cb8233ddc" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_5bd7988d-3874-4a62-8800-757e0c004911" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_NetCashProvidedByUsedInOperatingActivities"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetCashProvidedByUsedInOperatingActivitiesContinuingOperations_976e2f65-a0b6-4471-b211-5a3e34ab34ff" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_NetCashProvidedByUsedInOperatingActivitiesContinuingOperations"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_5bd7988d-3874-4a62-8800-757e0c004911" xlink:to="loc_us-gaap_NetCashProvidedByUsedInOperatingActivitiesContinuingOperations_976e2f65-a0b6-4471-b211-5a3e34ab34ff" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CashProvidedByUsedInOperatingActivitiesDiscontinuedOperations_df466466-60c6-48ec-85f3-38c36d911dfe" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_CashProvidedByUsedInOperatingActivitiesDiscontinuedOperations"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_5bd7988d-3874-4a62-8800-757e0c004911" xlink:to="loc_us-gaap_CashProvidedByUsedInOperatingActivitiesDiscontinuedOperations_df466466-60c6-48ec-85f3-38c36d911dfe" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetCashProvidedByUsedInFinancingActivitiesContinuingOperations_6bf1e453-b956-4086-8d5e-7bb537881ff0" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_NetCashProvidedByUsedInFinancingActivitiesContinuingOperations"/>
    <link:loc xlink:type="locator" xlink:label="loc_oxy_PaymentsForContractWithCustomerLiabilitySaleOfFutureRoyaltiesFinancingActivities_2632bcad-d770-4a36-80da-06d27c433961" xlink:href="oxy-20221231.xsd#oxy_PaymentsForContractWithCustomerLiabilitySaleOfFutureRoyaltiesFinancingActivities"/>
    <link:calculationArc order="1" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivitiesContinuingOperations_6bf1e453-b956-4086-8d5e-7bb537881ff0" xlink:to="loc_oxy_PaymentsForContractWithCustomerLiabilitySaleOfFutureRoyaltiesFinancingActivities_2632bcad-d770-4a36-80da-06d27c433961" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RepaymentsOfAccountsReceivableSecuritization_7ee3256f-503c-42f4-a9e6-bcf122c418a8" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_RepaymentsOfAccountsReceivableSecuritization"/>
    <link:calculationArc order="2" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivitiesContinuingOperations_6bf1e453-b956-4086-8d5e-7bb537881ff0" xlink:to="loc_us-gaap_RepaymentsOfAccountsReceivableSecuritization_7ee3256f-503c-42f4-a9e6-bcf122c418a8" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PaymentsForRepurchaseOfCommonStock_c48613e9-4815-4987-b622-cecf4f4b456e" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_PaymentsForRepurchaseOfCommonStock"/>
    <link:calculationArc order="3" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivitiesContinuingOperations_6bf1e453-b956-4086-8d5e-7bb537881ff0" xlink:to="loc_us-gaap_PaymentsForRepurchaseOfCommonStock_c48613e9-4815-4987-b622-cecf4f4b456e" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ProceedsFromAccountsReceivableSecuritization_54ab89df-6994-4f45-abeb-b25540a3bd21" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ProceedsFromAccountsReceivableSecuritization"/>
    <link:calculationArc order="4" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivitiesContinuingOperations_6bf1e453-b956-4086-8d5e-7bb537881ff0" xlink:to="loc_us-gaap_ProceedsFromAccountsReceivableSecuritization_54ab89df-6994-4f45-abeb-b25540a3bd21" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ProceedsFromPaymentsForOtherFinancingActivities_3e132db1-f39c-4e1f-9cfc-af5e5b1b5d2f" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ProceedsFromPaymentsForOtherFinancingActivities"/>
    <link:calculationArc order="5" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivitiesContinuingOperations_6bf1e453-b956-4086-8d5e-7bb537881ff0" xlink:to="loc_us-gaap_ProceedsFromPaymentsForOtherFinancingActivities_3e132db1-f39c-4e1f-9cfc-af5e5b1b5d2f" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ProceedsFromIssuanceOfCommonStock_0fb6499a-5384-4fc9-a3d6-2b8be0f1056b" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ProceedsFromIssuanceOfCommonStock"/>
    <link:calculationArc order="6" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivitiesContinuingOperations_6bf1e453-b956-4086-8d5e-7bb537881ff0" xlink:to="loc_us-gaap_ProceedsFromIssuanceOfCommonStock_0fb6499a-5384-4fc9-a3d6-2b8be0f1056b" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PaymentsForProceedsFromDerivativeInstrumentFinancingActivities_e099cc3c-782f-498f-8234-90378a32579b" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_PaymentsForProceedsFromDerivativeInstrumentFinancingActivities"/>
    <link:calculationArc order="7" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivitiesContinuingOperations_6bf1e453-b956-4086-8d5e-7bb537881ff0" xlink:to="loc_us-gaap_PaymentsForProceedsFromDerivativeInstrumentFinancingActivities_e099cc3c-782f-498f-8234-90378a32579b" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RepaymentsOfLongTermDebt_b921eb57-e24c-474b-b8ab-01aa79a316e3" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_RepaymentsOfLongTermDebt"/>
    <link:calculationArc order="8" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivitiesContinuingOperations_6bf1e453-b956-4086-8d5e-7bb537881ff0" xlink:to="loc_us-gaap_RepaymentsOfLongTermDebt_b921eb57-e24c-474b-b8ab-01aa79a316e3" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PaymentsOfDividendsCommonStock_77514139-2f38-4aa9-a3d7-532554342593" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_PaymentsOfDividendsCommonStock"/>
    <link:calculationArc order="9" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivitiesContinuingOperations_6bf1e453-b956-4086-8d5e-7bb537881ff0" xlink:to="loc_us-gaap_PaymentsOfDividendsCommonStock_77514139-2f38-4aa9-a3d7-532554342593" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ProceedsFromIssuanceOfLongTermDebt_dee1fc7e-9f86-4f98-b8d4-7b10c1e74d9f" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ProceedsFromIssuanceOfLongTermDebt"/>
    <link:calculationArc order="10" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivitiesContinuingOperations_6bf1e453-b956-4086-8d5e-7bb537881ff0" xlink:to="loc_us-gaap_ProceedsFromIssuanceOfLongTermDebt_dee1fc7e-9f86-4f98-b8d4-7b10c1e74d9f" xlink:type="arc"/>
  </link:calculationLink>
  <link:roleRef roleURI="http://www.oxy.com/role/SUMMARYOFSIGNIFICANTACCOUNTINGPOLICIESCASHEQUIVALENTSANDRESTRICTEDCASHEQUIVALENTSDetails" xlink:type="simple" xlink:href="oxy-20221231.xsd#SUMMARYOFSIGNIFICANTACCOUNTINGPOLICIESCASHEQUIVALENTSANDRESTRICTEDCASHEQUIVALENTSDetails"/>
  <link:calculationLink xlink:role="http://www.oxy.com/role/SUMMARYOFSIGNIFICANTACCOUNTINGPOLICIESCASHEQUIVALENTSANDRESTRICTEDCASHEQUIVALENTSDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents_56d503fe-154b-452e-babf-0b4e8384951f" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestrictedCashEquivalentsNoncurrent_d2f1ae0d-2c33-4804-b7a5-89ce2dc68970" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_RestrictedCashEquivalentsNoncurrent"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents_56d503fe-154b-452e-babf-0b4e8384951f" xlink:to="loc_us-gaap_RestrictedCashEquivalentsNoncurrent_d2f1ae0d-2c33-4804-b7a5-89ce2dc68970" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestrictedCashAndCashEquivalentsAtCarryingValue_93857db3-b35c-4cd9-9178-ef2ae3a74a14" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_RestrictedCashAndCashEquivalentsAtCarryingValue"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents_56d503fe-154b-452e-babf-0b4e8384951f" xlink:to="loc_us-gaap_RestrictedCashAndCashEquivalentsAtCarryingValue_93857db3-b35c-4cd9-9178-ef2ae3a74a14" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CashAndCashEquivalentsAtCarryingValue_53eb2c24-ea53-4c3f-963e-eec8614490e1" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_CashAndCashEquivalentsAtCarryingValue"/>
    <link:calculationArc order="3" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents_56d503fe-154b-452e-babf-0b4e8384951f" xlink:to="loc_us-gaap_CashAndCashEquivalentsAtCarryingValue_53eb2c24-ea53-4c3f-963e-eec8614490e1" xlink:type="arc"/>
  </link:calculationLink>
  <link:roleRef roleURI="http://www.oxy.com/role/REVENUERECONCILIATIONDetails" xlink:type="simple" xlink:href="oxy-20221231.xsd#REVENUERECONCILIATIONDetails"/>
  <link:calculationLink xlink:role="http://www.oxy.com/role/REVENUERECONCILIATIONDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_Revenues_25598467-cbdd-422a-a0be-805b06d48a7e" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_Revenues"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax_40730fe8-d553-423b-8482-6493e992e3aa" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_Revenues_25598467-cbdd-422a-a0be-805b06d48a7e" xlink:to="loc_us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax_40730fe8-d553-423b-8482-6493e992e3aa" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_oxy_AllOtherRevenues_2ef5f95c-5770-469e-8ad5-c24b3bf1f33a" xlink:href="oxy-20221231.xsd#oxy_AllOtherRevenues"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_Revenues_25598467-cbdd-422a-a0be-805b06d48a7e" xlink:to="loc_oxy_AllOtherRevenues_2ef5f95c-5770-469e-8ad5-c24b3bf1f33a" xlink:type="arc"/>
  </link:calculationLink>
  <link:roleRef roleURI="http://www.oxy.com/role/INVENTORIESDetails" xlink:type="simple" xlink:href="oxy-20221231.xsd#INVENTORIESDetails"/>
  <link:calculationLink xlink:role="http://www.oxy.com/role/INVENTORIESDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InventoryGross_642d216c-ae3c-4420-af78-f3d9ec6d815a" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_InventoryGross"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InventoryRawMaterials_1ad32855-5db5-48f2-87eb-f750c06480e1" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_InventoryRawMaterials"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_InventoryGross_642d216c-ae3c-4420-af78-f3d9ec6d815a" xlink:to="loc_us-gaap_InventoryRawMaterials_1ad32855-5db5-48f2-87eb-f750c06480e1" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherInventorySupplies_6aef0366-af6d-499e-81cd-3a9cca443c15" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_OtherInventorySupplies"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_InventoryGross_642d216c-ae3c-4420-af78-f3d9ec6d815a" xlink:to="loc_us-gaap_OtherInventorySupplies_6aef0366-af6d-499e-81cd-3a9cca443c15" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InventoryFinishedGoods_5fa65e7e-64ed-4d07-b19c-390ef855304f" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_InventoryFinishedGoods"/>
    <link:calculationArc order="3" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_InventoryGross_642d216c-ae3c-4420-af78-f3d9ec6d815a" xlink:to="loc_us-gaap_InventoryFinishedGoods_5fa65e7e-64ed-4d07-b19c-390ef855304f" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InventoryNet_08ef9457-61fc-45f5-8eee-6c9559a0ef23" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_InventoryNet"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InventoryGross_7e350284-b24c-4274-b55b-0bb2a60bf577" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_InventoryGross"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_InventoryNet_08ef9457-61fc-45f5-8eee-6c9559a0ef23" xlink:to="loc_us-gaap_InventoryGross_7e350284-b24c-4274-b55b-0bb2a60bf577" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InventoryLIFOReserve_76d99e70-7737-4a17-80e9-0dea0229e2ef" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_InventoryLIFOReserve"/>
    <link:calculationArc order="2" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_InventoryNet_08ef9457-61fc-45f5-8eee-6c9559a0ef23" xlink:to="loc_us-gaap_InventoryLIFOReserve_76d99e70-7737-4a17-80e9-0dea0229e2ef" xlink:type="arc"/>
  </link:calculationLink>
  <link:roleRef roleURI="http://www.oxy.com/role/ACQUISITIONSDIVESTITURESANDOTHERTRANSACTIONSSUMMARYOFREVENUESANDCOSTSFROMDISCONTINUEDOPERATIONSDetails" xlink:type="simple" xlink:href="oxy-20221231.xsd#ACQUISITIONSDIVESTITURESANDOTHERTRANSACTIONSSUMMARYOFREVENUESANDCOSTSFROMDISCONTINUEDOPERATIONSDetails"/>
  <link:calculationLink xlink:role="http://www.oxy.com/role/ACQUISITIONSDIVESTITURESANDOTHERTRANSACTIONSSUMMARYOFREVENUESANDCOSTSFROMDISCONTINUEDOPERATIONSDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTax_bd4e33fa-fe93-4a3f-a4fc-01a70dc0e228" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTax"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DiscontinuedOperationIncomeLossFromDiscontinuedOperationBeforeIncomeTax_66bfc7c6-fc12-49b2-b247-11f6d750eb3d" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_DiscontinuedOperationIncomeLossFromDiscontinuedOperationBeforeIncomeTax"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTax_bd4e33fa-fe93-4a3f-a4fc-01a70dc0e228" xlink:to="loc_us-gaap_DiscontinuedOperationIncomeLossFromDiscontinuedOperationBeforeIncomeTax_66bfc7c6-fc12-49b2-b247-11f6d750eb3d" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DiscontinuedOperationTaxEffectOfDiscontinuedOperation_5f3feaa5-141a-41dd-be84-3dba632839f9" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_DiscontinuedOperationTaxEffectOfDiscontinuedOperation"/>
    <link:calculationArc order="2" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTax_bd4e33fa-fe93-4a3f-a4fc-01a70dc0e228" xlink:to="loc_us-gaap_DiscontinuedOperationTaxEffectOfDiscontinuedOperation_5f3feaa5-141a-41dd-be84-3dba632839f9" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DiscontinuedOperationIncomeLossFromDiscontinuedOperationBeforeIncomeTax_a122e081-f5f9-4635-b5b6-581ac4571422" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_DiscontinuedOperationIncomeLossFromDiscontinuedOperationBeforeIncomeTax"/>
    <link:loc xlink:type="locator" xlink:label="loc_oxy_DisposalGroupIncludingDiscontinuedOperationCostsAndOtherDeductionsNet_a05781fb-dacd-4eba-a739-c1f4b970b431" xlink:href="oxy-20221231.xsd#oxy_DisposalGroupIncludingDiscontinuedOperationCostsAndOtherDeductionsNet"/>
    <link:calculationArc order="1" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_DiscontinuedOperationIncomeLossFromDiscontinuedOperationBeforeIncomeTax_a122e081-f5f9-4635-b5b6-581ac4571422" xlink:to="loc_oxy_DisposalGroupIncludingDiscontinuedOperationCostsAndOtherDeductionsNet_a05781fb-dacd-4eba-a739-c1f4b970b431" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DisposalGroupIncludingDiscontinuedOperationRevenue_0b416076-f110-49d0-b487-d09e67de9b9d" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_DisposalGroupIncludingDiscontinuedOperationRevenue"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_DiscontinuedOperationIncomeLossFromDiscontinuedOperationBeforeIncomeTax_a122e081-f5f9-4635-b5b6-581ac4571422" xlink:to="loc_us-gaap_DisposalGroupIncludingDiscontinuedOperationRevenue_0b416076-f110-49d0-b487-d09e67de9b9d" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_oxy_DisposalGroupIncludingDiscontinuedOperationCostsAndOtherDeductionsNet_7503b586-b845-4e3a-a4d2-c243f0bfa0e1" xlink:href="oxy-20221231.xsd#oxy_DisposalGroupIncludingDiscontinuedOperationCostsAndOtherDeductionsNet"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DisposalGroupIncludingDiscontinuedOperationOtherExpense_196e0d02-1f59-40ad-ba35-49c73e409f34" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_DisposalGroupIncludingDiscontinuedOperationOtherExpense"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_oxy_DisposalGroupIncludingDiscontinuedOperationCostsAndOtherDeductionsNet_7503b586-b845-4e3a-a4d2-c243f0bfa0e1" xlink:to="loc_us-gaap_DisposalGroupIncludingDiscontinuedOperationOtherExpense_196e0d02-1f59-40ad-ba35-49c73e409f34" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DisposalGroupIncludingDiscontinuedOperationCostsOfGoodsSold_02dbb36b-2bc5-4c8a-84dc-9d6303cca68d" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_DisposalGroupIncludingDiscontinuedOperationCostsOfGoodsSold"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_oxy_DisposalGroupIncludingDiscontinuedOperationCostsAndOtherDeductionsNet_7503b586-b845-4e3a-a4d2-c243f0bfa0e1" xlink:to="loc_us-gaap_DisposalGroupIncludingDiscontinuedOperationCostsOfGoodsSold_02dbb36b-2bc5-4c8a-84dc-9d6303cca68d" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_oxy_DisposalGroupIncludingDiscontinuedOperationAssetsHeldforSaleFairValueAdjustment_1ce7d6bd-479f-4304-95c9-dced909df9f8" xlink:href="oxy-20221231.xsd#oxy_DisposalGroupIncludingDiscontinuedOperationAssetsHeldforSaleFairValueAdjustment"/>
    <link:calculationArc order="3" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_oxy_DisposalGroupIncludingDiscontinuedOperationCostsAndOtherDeductionsNet_7503b586-b845-4e3a-a4d2-c243f0bfa0e1" xlink:to="loc_oxy_DisposalGroupIncludingDiscontinuedOperationAssetsHeldforSaleFairValueAdjustment_1ce7d6bd-479f-4304-95c9-dced909df9f8" xlink:type="arc"/>
  </link:calculationLink>
  <link:roleRef roleURI="http://www.oxy.com/role/LONGTERMDEBTSCHEDULEDetails" xlink:type="simple" xlink:href="oxy-20221231.xsd#LONGTERMDEBTSCHEDULEDetails"/>
  <link:calculationLink xlink:role="http://www.oxy.com/role/LONGTERMDEBTSCHEDULEDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongTermDebtAndCapitalLeaseObligationsIncludingCurrentMaturities_a1fca6ec-756a-40ac-8ca6-d87a8b03b824" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_LongTermDebtAndCapitalLeaseObligationsIncludingCurrentMaturities"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongTermDebt_0fd22b22-9ab8-4c4f-821c-ad83e1ecb41f" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_LongTermDebt"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_LongTermDebtAndCapitalLeaseObligationsIncludingCurrentMaturities_a1fca6ec-756a-40ac-8ca6-d87a8b03b824" xlink:to="loc_us-gaap_LongTermDebt_0fd22b22-9ab8-4c4f-821c-ad83e1ecb41f" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinanceLeaseLiabilityCurrent_8f298520-ef94-44cc-b483-0fb0d9a5df74" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_FinanceLeaseLiabilityCurrent"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_LongTermDebtAndCapitalLeaseObligationsIncludingCurrentMaturities_a1fca6ec-756a-40ac-8ca6-d87a8b03b824" xlink:to="loc_us-gaap_FinanceLeaseLiabilityCurrent_8f298520-ef94-44cc-b483-0fb0d9a5df74" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinanceLeaseLiabilityNoncurrent_56dca810-5643-4980-bf46-bf19e9747fcc" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_FinanceLeaseLiabilityNoncurrent"/>
    <link:calculationArc order="3" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_LongTermDebtAndCapitalLeaseObligationsIncludingCurrentMaturities_a1fca6ec-756a-40ac-8ca6-d87a8b03b824" xlink:to="loc_us-gaap_FinanceLeaseLiabilityNoncurrent_56dca810-5643-4980-bf46-bf19e9747fcc" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongTermDebt_88a59f28-8484-49fd-937e-1f9d04c82e5a" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_LongTermDebt"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentUnamortizedDiscountPremiumNet_19595f9f-4d58-4780-bbee-0329c4a91ca3" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_DebtInstrumentUnamortizedDiscountPremiumNet"/>
    <link:calculationArc order="1" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_LongTermDebt_88a59f28-8484-49fd-937e-1f9d04c82e5a" xlink:to="loc_us-gaap_DebtInstrumentUnamortizedDiscountPremiumNet_19595f9f-4d58-4780-bbee-0329c4a91ca3" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredFinanceCostsNet_b217119e-064b-457e-befa-404ea5fe1f8f" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_DeferredFinanceCostsNet"/>
    <link:calculationArc order="2" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_LongTermDebt_88a59f28-8484-49fd-937e-1f9d04c82e5a" xlink:to="loc_us-gaap_DeferredFinanceCostsNet_b217119e-064b-457e-befa-404ea5fe1f8f" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentCarryingAmount_57ca92ff-9b6e-464d-96b7-65e2fd0a060f" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_DebtInstrumentCarryingAmount"/>
    <link:calculationArc order="3" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_LongTermDebt_88a59f28-8484-49fd-937e-1f9d04c82e5a" xlink:to="loc_us-gaap_DebtInstrumentCarryingAmount_57ca92ff-9b6e-464d-96b7-65e2fd0a060f" xlink:type="arc"/>
  </link:calculationLink>
  <link:roleRef roleURI="http://www.oxy.com/role/LONGTERMDEBTSCHEDULEDetails_1" xlink:type="simple" xlink:href="oxy-20221231.xsd#LONGTERMDEBTSCHEDULEDetails_1"/>
  <link:calculationLink xlink:role="http://www.oxy.com/role/LONGTERMDEBTSCHEDULEDetails_1" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongTermDebtAndCapitalLeaseObligationsIncludingCurrentMaturities_c529c92b-eac0-4f51-93ac-cfb1102b9aef" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_LongTermDebtAndCapitalLeaseObligationsIncludingCurrentMaturities"/>
    <link:loc xlink:type="locator" xlink:label="loc_oxy_LongTermDebtCurrentMaturitiesExcludingFinanceLeases_a1cef813-322c-4f93-9964-f4f4bddaf423" xlink:href="oxy-20221231.xsd#oxy_LongTermDebtCurrentMaturitiesExcludingFinanceLeases"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_LongTermDebtAndCapitalLeaseObligationsIncludingCurrentMaturities_c529c92b-eac0-4f51-93ac-cfb1102b9aef" xlink:to="loc_oxy_LongTermDebtCurrentMaturitiesExcludingFinanceLeases_a1cef813-322c-4f93-9964-f4f4bddaf423" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongTermDebtAndCapitalLeaseObligations_1d398180-9066-4595-898b-07c46c4656a8" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_LongTermDebtAndCapitalLeaseObligations"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_LongTermDebtAndCapitalLeaseObligationsIncludingCurrentMaturities_c529c92b-eac0-4f51-93ac-cfb1102b9aef" xlink:to="loc_us-gaap_LongTermDebtAndCapitalLeaseObligations_1d398180-9066-4595-898b-07c46c4656a8" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_oxy_FinanceLeaseLiabilityCurrentMaturities_97b56c70-f24a-4df7-b4d8-9d901c1b5851" xlink:href="oxy-20221231.xsd#oxy_FinanceLeaseLiabilityCurrentMaturities"/>
    <link:calculationArc order="3" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_LongTermDebtAndCapitalLeaseObligationsIncludingCurrentMaturities_c529c92b-eac0-4f51-93ac-cfb1102b9aef" xlink:to="loc_oxy_FinanceLeaseLiabilityCurrentMaturities_97b56c70-f24a-4df7-b4d8-9d901c1b5851" xlink:type="arc"/>
  </link:calculationLink>
  <link:roleRef roleURI="http://www.oxy.com/role/LEASECOMMITMENTSLEASEASSETSANDLIABILITIESDetails" xlink:type="simple" xlink:href="oxy-20221231.xsd#LEASECOMMITMENTSLEASEASSETSANDLIABILITIESDetails"/>
  <link:calculationLink xlink:role="http://www.oxy.com/role/LEASECOMMITMENTSLEASEASSETSANDLIABILITIESDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_oxy_LeaseRightOfUseAsset_8aa889a4-69e5-44d0-8597-3e169beb9dff" xlink:href="oxy-20221231.xsd#oxy_LeaseRightOfUseAsset"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingLeaseRightOfUseAsset_c282fe09-468c-4f36-9f41-4cfbbf649b17" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_OperatingLeaseRightOfUseAsset"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_oxy_LeaseRightOfUseAsset_8aa889a4-69e5-44d0-8597-3e169beb9dff" xlink:to="loc_us-gaap_OperatingLeaseRightOfUseAsset_c282fe09-468c-4f36-9f41-4cfbbf649b17" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinanceLeaseRightOfUseAsset_5e085d00-1ed1-40ff-96ac-5beed9596210" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_FinanceLeaseRightOfUseAsset"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_oxy_LeaseRightOfUseAsset_8aa889a4-69e5-44d0-8597-3e169beb9dff" xlink:to="loc_us-gaap_FinanceLeaseRightOfUseAsset_5e085d00-1ed1-40ff-96ac-5beed9596210" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_oxy_LeaseLiability_ffa9bbdc-9536-4b25-8e1b-c04b22a91acb" xlink:href="oxy-20221231.xsd#oxy_LeaseLiability"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingLeaseLiabilityCurrent_232277e1-3a14-46c3-9cc5-6774ceb55f36" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_OperatingLeaseLiabilityCurrent"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_oxy_LeaseLiability_ffa9bbdc-9536-4b25-8e1b-c04b22a91acb" xlink:to="loc_us-gaap_OperatingLeaseLiabilityCurrent_232277e1-3a14-46c3-9cc5-6774ceb55f36" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinanceLeaseLiabilityCurrent_6a4cbda9-cbb4-4bad-8175-cbe2303b1e56" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_FinanceLeaseLiabilityCurrent"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_oxy_LeaseLiability_ffa9bbdc-9536-4b25-8e1b-c04b22a91acb" xlink:to="loc_us-gaap_FinanceLeaseLiabilityCurrent_6a4cbda9-cbb4-4bad-8175-cbe2303b1e56" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingLeaseLiabilityNoncurrent_0e4215b9-b818-447a-a08c-715d708573c7" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_OperatingLeaseLiabilityNoncurrent"/>
    <link:calculationArc order="3" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_oxy_LeaseLiability_ffa9bbdc-9536-4b25-8e1b-c04b22a91acb" xlink:to="loc_us-gaap_OperatingLeaseLiabilityNoncurrent_0e4215b9-b818-447a-a08c-715d708573c7" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinanceLeaseLiabilityNoncurrent_ff46673b-d4d4-4b0c-be24-21380cab3a16" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_FinanceLeaseLiabilityNoncurrent"/>
    <link:calculationArc order="4" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_oxy_LeaseLiability_ffa9bbdc-9536-4b25-8e1b-c04b22a91acb" xlink:to="loc_us-gaap_FinanceLeaseLiabilityNoncurrent_ff46673b-d4d4-4b0c-be24-21380cab3a16" xlink:type="arc"/>
  </link:calculationLink>
  <link:roleRef roleURI="http://www.oxy.com/role/LEASECOMMITMENTSSCHEDULEOFOPERATINGANDFINANCELEASEMATURITIESDetails" xlink:type="simple" xlink:href="oxy-20221231.xsd#LEASECOMMITMENTSSCHEDULEOFOPERATINGANDFINANCELEASEMATURITIESDetails"/>
  <link:calculationLink xlink:role="http://www.oxy.com/role/LEASECOMMITMENTSSCHEDULEOFOPERATINGANDFINANCELEASEMATURITIESDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_oxy_OperatingAndFinanceLeaseLiabilityPaymentsDueYearOne_f22668f9-c06b-48de-97e2-f86805ff920c" xlink:href="oxy-20221231.xsd#oxy_OperatingAndFinanceLeaseLiabilityPaymentsDueYearOne"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths_f9ba0897-8e4b-4a31-ab64-7b59a5dd2422" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_oxy_OperatingAndFinanceLeaseLiabilityPaymentsDueYearOne_f22668f9-c06b-48de-97e2-f86805ff920c" xlink:to="loc_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths_f9ba0897-8e4b-4a31-ab64-7b59a5dd2422" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinanceLeaseLiabilityPaymentsDueNextTwelveMonths_a5767a5c-dbe3-42fc-8e58-caee9dcad7f4" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_FinanceLeaseLiabilityPaymentsDueNextTwelveMonths"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_oxy_OperatingAndFinanceLeaseLiabilityPaymentsDueYearOne_f22668f9-c06b-48de-97e2-f86805ff920c" xlink:to="loc_us-gaap_FinanceLeaseLiabilityPaymentsDueNextTwelveMonths_a5767a5c-dbe3-42fc-8e58-caee9dcad7f4" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_oxy_OperatingAndFinanceLeaseLiabilityPaymentsDueYearThree_73d6f671-271a-4795-9977-9eb1463077a8" xlink:href="oxy-20221231.xsd#oxy_OperatingAndFinanceLeaseLiabilityPaymentsDueYearThree"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearThree_40698f59-3aff-4032-ba1d-c8f7461b8103" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearThree"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_oxy_OperatingAndFinanceLeaseLiabilityPaymentsDueYearThree_73d6f671-271a-4795-9977-9eb1463077a8" xlink:to="loc_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearThree_40698f59-3aff-4032-ba1d-c8f7461b8103" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinanceLeaseLiabilityPaymentsDueYearThree_8cd8f7a7-b192-4ebe-b1b1-21e3805cb272" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_FinanceLeaseLiabilityPaymentsDueYearThree"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_oxy_OperatingAndFinanceLeaseLiabilityPaymentsDueYearThree_73d6f671-271a-4795-9977-9eb1463077a8" xlink:to="loc_us-gaap_FinanceLeaseLiabilityPaymentsDueYearThree_8cd8f7a7-b192-4ebe-b1b1-21e3805cb272" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_oxy_OperatingAndFinanceLeaseLiabilityPaymentsDue_00591fe0-881f-41aa-b6e5-75f29327a0d2" xlink:href="oxy-20221231.xsd#oxy_OperatingAndFinanceLeaseLiabilityPaymentsDue"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDue_ed1c012a-de6b-48a7-9eb6-ad46af8765fe" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_LesseeOperatingLeaseLiabilityPaymentsDue"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_oxy_OperatingAndFinanceLeaseLiabilityPaymentsDue_00591fe0-881f-41aa-b6e5-75f29327a0d2" xlink:to="loc_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDue_ed1c012a-de6b-48a7-9eb6-ad46af8765fe" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinanceLeaseLiabilityPaymentsDue_f8bdd958-d4f9-4335-a792-11b9e52d8eb6" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_FinanceLeaseLiabilityPaymentsDue"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_oxy_OperatingAndFinanceLeaseLiabilityPaymentsDue_00591fe0-881f-41aa-b6e5-75f29327a0d2" xlink:to="loc_us-gaap_FinanceLeaseLiabilityPaymentsDue_f8bdd958-d4f9-4335-a792-11b9e52d8eb6" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_oxy_OperatingAndFinanceLeaseLiability_995220f8-3325-4a52-8454-5aa18eeeb194" xlink:href="oxy-20221231.xsd#oxy_OperatingAndFinanceLeaseLiability"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingLeaseLiability_b2c9cc4e-d00d-43cf-85b0-4c54d577890e" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_OperatingLeaseLiability"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_oxy_OperatingAndFinanceLeaseLiability_995220f8-3325-4a52-8454-5aa18eeeb194" xlink:to="loc_us-gaap_OperatingLeaseLiability_b2c9cc4e-d00d-43cf-85b0-4c54d577890e" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinanceLeaseLiability_5a0a09bb-b35a-4bbd-97bf-00eb01bb77bd" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_FinanceLeaseLiability"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_oxy_OperatingAndFinanceLeaseLiability_995220f8-3325-4a52-8454-5aa18eeeb194" xlink:to="loc_us-gaap_FinanceLeaseLiability_5a0a09bb-b35a-4bbd-97bf-00eb01bb77bd" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinanceLeaseLiabilityPaymentsDue_f6dd0174-c5d4-46d0-aa3e-ea7c7f3c3cc9" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_FinanceLeaseLiabilityPaymentsDue"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinanceLeaseLiabilityUndiscountedExcessAmount_3c136954-3e4d-49c7-9db2-3562bc9e9172" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_FinanceLeaseLiabilityUndiscountedExcessAmount"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_FinanceLeaseLiabilityPaymentsDue_f6dd0174-c5d4-46d0-aa3e-ea7c7f3c3cc9" xlink:to="loc_us-gaap_FinanceLeaseLiabilityUndiscountedExcessAmount_3c136954-3e4d-49c7-9db2-3562bc9e9172" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinanceLeaseLiability_5edd63e7-6a5f-41aa-ac6a-156920af844e" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_FinanceLeaseLiability"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_FinanceLeaseLiabilityPaymentsDue_f6dd0174-c5d4-46d0-aa3e-ea7c7f3c3cc9" xlink:to="loc_us-gaap_FinanceLeaseLiability_5edd63e7-6a5f-41aa-ac6a-156920af844e" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_oxy_OperatingAndFinanceLeaseLiabilityPaymentsDueYearTwo_3a78baf5-aa1e-4f31-b329-41a58a57f67e" xlink:href="oxy-20221231.xsd#oxy_OperatingAndFinanceLeaseLiabilityPaymentsDueYearTwo"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearTwo_80125842-5c20-40a1-ad88-ee9b20520555" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearTwo"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_oxy_OperatingAndFinanceLeaseLiabilityPaymentsDueYearTwo_3a78baf5-aa1e-4f31-b329-41a58a57f67e" xlink:to="loc_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearTwo_80125842-5c20-40a1-ad88-ee9b20520555" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinanceLeaseLiabilityPaymentsDueYearTwo_3322e4ed-39f5-4b10-821a-ff3fd40c34f5" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_FinanceLeaseLiabilityPaymentsDueYearTwo"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_oxy_OperatingAndFinanceLeaseLiabilityPaymentsDueYearTwo_3a78baf5-aa1e-4f31-b329-41a58a57f67e" xlink:to="loc_us-gaap_FinanceLeaseLiabilityPaymentsDueYearTwo_3322e4ed-39f5-4b10-821a-ff3fd40c34f5" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_oxy_OperatingAndFinanceLeaseLiabilityPaymentsDueYearFive_bb1b0221-6d06-4742-98f3-51c942eacc50" xlink:href="oxy-20221231.xsd#oxy_OperatingAndFinanceLeaseLiabilityPaymentsDueYearFive"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearFive_f6d5e892-b48b-41b4-84ae-331f9b1b85ee" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearFive"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_oxy_OperatingAndFinanceLeaseLiabilityPaymentsDueYearFive_bb1b0221-6d06-4742-98f3-51c942eacc50" xlink:to="loc_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearFive_f6d5e892-b48b-41b4-84ae-331f9b1b85ee" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinanceLeaseLiabilityPaymentsDueYearFive_b959125f-9ac3-4606-8552-f1dc09de6201" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_FinanceLeaseLiabilityPaymentsDueYearFive"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_oxy_OperatingAndFinanceLeaseLiabilityPaymentsDueYearFive_bb1b0221-6d06-4742-98f3-51c942eacc50" xlink:to="loc_us-gaap_FinanceLeaseLiabilityPaymentsDueYearFive_b959125f-9ac3-4606-8552-f1dc09de6201" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_oxy_OperatingAndFinanceLeaseLiabilityPaymentsDueYearFour_ac2cc740-3e72-4365-bbea-64b2e64e4180" xlink:href="oxy-20221231.xsd#oxy_OperatingAndFinanceLeaseLiabilityPaymentsDueYearFour"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearFour_871bf67f-926e-450d-931d-36ce153d37d0" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearFour"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_oxy_OperatingAndFinanceLeaseLiabilityPaymentsDueYearFour_ac2cc740-3e72-4365-bbea-64b2e64e4180" xlink:to="loc_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearFour_871bf67f-926e-450d-931d-36ce153d37d0" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinanceLeaseLiabilityPaymentsDueYearFour_c371dc92-3d38-4f93-9efa-79bf0add896a" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_FinanceLeaseLiabilityPaymentsDueYearFour"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_oxy_OperatingAndFinanceLeaseLiabilityPaymentsDueYearFour_ac2cc740-3e72-4365-bbea-64b2e64e4180" xlink:to="loc_us-gaap_FinanceLeaseLiabilityPaymentsDueYearFour_c371dc92-3d38-4f93-9efa-79bf0add896a" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_oxy_OperatingAndFinanceLeaseLiabilityUndiscountedExcessAmount_73433ab8-0249-4919-a94e-6ad3847a0162" xlink:href="oxy-20221231.xsd#oxy_OperatingAndFinanceLeaseLiabilityUndiscountedExcessAmount"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LesseeOperatingLeaseLiabilityUndiscountedExcessAmount_1ebc4949-027e-4130-99fb-f082b68af709" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_LesseeOperatingLeaseLiabilityUndiscountedExcessAmount"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_oxy_OperatingAndFinanceLeaseLiabilityUndiscountedExcessAmount_73433ab8-0249-4919-a94e-6ad3847a0162" xlink:to="loc_us-gaap_LesseeOperatingLeaseLiabilityUndiscountedExcessAmount_1ebc4949-027e-4130-99fb-f082b68af709" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinanceLeaseLiabilityUndiscountedExcessAmount_3716034c-543c-4e7d-9bed-43797136ec6a" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_FinanceLeaseLiabilityUndiscountedExcessAmount"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_oxy_OperatingAndFinanceLeaseLiabilityUndiscountedExcessAmount_73433ab8-0249-4919-a94e-6ad3847a0162" xlink:to="loc_us-gaap_FinanceLeaseLiabilityUndiscountedExcessAmount_3716034c-543c-4e7d-9bed-43797136ec6a" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDue_3f7c8b93-d982-485e-b19c-a52bb7e4af38" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_LesseeOperatingLeaseLiabilityPaymentsDue"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LesseeOperatingLeaseLiabilityUndiscountedExcessAmount_ec81c19a-a84f-4701-b414-c5efcdcc5fea" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_LesseeOperatingLeaseLiabilityUndiscountedExcessAmount"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDue_3f7c8b93-d982-485e-b19c-a52bb7e4af38" xlink:to="loc_us-gaap_LesseeOperatingLeaseLiabilityUndiscountedExcessAmount_ec81c19a-a84f-4701-b414-c5efcdcc5fea" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingLeaseLiability_475d7b83-276d-4eac-9040-75bbffdd2655" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_OperatingLeaseLiability"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDue_3f7c8b93-d982-485e-b19c-a52bb7e4af38" xlink:to="loc_us-gaap_OperatingLeaseLiability_475d7b83-276d-4eac-9040-75bbffdd2655" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_oxy_OperatingAndFinanceLeaseLiabilityPaymentsDueAfterYearFive_89002c51-44f5-4d0b-ae98-021bf5e52089" xlink:href="oxy-20221231.xsd#oxy_OperatingAndFinanceLeaseLiabilityPaymentsDueAfterYearFive"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive_6cde405b-993b-42df-83ea-6ce4a9c0df08" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_oxy_OperatingAndFinanceLeaseLiabilityPaymentsDueAfterYearFive_89002c51-44f5-4d0b-ae98-021bf5e52089" xlink:to="loc_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive_6cde405b-993b-42df-83ea-6ce4a9c0df08" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinanceLeaseLiabilityPaymentsDueAfterYearFive_979df60b-00f1-49d7-a6de-cabeba13a167" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_FinanceLeaseLiabilityPaymentsDueAfterYearFive"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_oxy_OperatingAndFinanceLeaseLiabilityPaymentsDueAfterYearFive_89002c51-44f5-4d0b-ae98-021bf5e52089" xlink:to="loc_us-gaap_FinanceLeaseLiabilityPaymentsDueAfterYearFive_979df60b-00f1-49d7-a6de-cabeba13a167" xlink:type="arc"/>
  </link:calculationLink>
  <link:roleRef roleURI="http://www.oxy.com/role/LEASECOMMITMENTSSCHEDULEOFOPERATINGANDFINANCELEASEMATURITIESDetails_1" xlink:type="simple" xlink:href="oxy-20221231.xsd#LEASECOMMITMENTSSCHEDULEOFOPERATINGANDFINANCELEASEMATURITIESDetails_1"/>
  <link:calculationLink xlink:role="http://www.oxy.com/role/LEASECOMMITMENTSSCHEDULEOFOPERATINGANDFINANCELEASEMATURITIESDetails_1" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_oxy_OperatingAndFinanceLeaseLiabilityPaymentsDue_84d007b2-dc3d-4e33-ab00-4dcafa7c77ff" xlink:href="oxy-20221231.xsd#oxy_OperatingAndFinanceLeaseLiabilityPaymentsDue"/>
    <link:loc xlink:type="locator" xlink:label="loc_oxy_OperatingAndFinanceLeaseLiabilityUndiscountedExcessAmount_0f8916af-ee51-4487-8eef-967dd59c11af" xlink:href="oxy-20221231.xsd#oxy_OperatingAndFinanceLeaseLiabilityUndiscountedExcessAmount"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_oxy_OperatingAndFinanceLeaseLiabilityPaymentsDue_84d007b2-dc3d-4e33-ab00-4dcafa7c77ff" xlink:to="loc_oxy_OperatingAndFinanceLeaseLiabilityUndiscountedExcessAmount_0f8916af-ee51-4487-8eef-967dd59c11af" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_oxy_OperatingAndFinanceLeaseLiability_d34d45f8-6e5a-4d5a-a220-4056148451cf" xlink:href="oxy-20221231.xsd#oxy_OperatingAndFinanceLeaseLiability"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_oxy_OperatingAndFinanceLeaseLiabilityPaymentsDue_84d007b2-dc3d-4e33-ab00-4dcafa7c77ff" xlink:to="loc_oxy_OperatingAndFinanceLeaseLiability_d34d45f8-6e5a-4d5a-a220-4056148451cf" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDue_6c35c3a3-31b0-413c-8974-000a7f1bf1ba" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_LesseeOperatingLeaseLiabilityPaymentsDue"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths_ee36d843-b484-4091-91ad-28108054ca07" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDue_6c35c3a3-31b0-413c-8974-000a7f1bf1ba" xlink:to="loc_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths_ee36d843-b484-4091-91ad-28108054ca07" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearTwo_2e5380b8-cb78-411e-bead-1bba0498d6d0" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearTwo"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDue_6c35c3a3-31b0-413c-8974-000a7f1bf1ba" xlink:to="loc_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearTwo_2e5380b8-cb78-411e-bead-1bba0498d6d0" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearThree_b50d15dc-0409-4d17-8fb6-f56f7c3fe676" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearThree"/>
    <link:calculationArc order="3" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDue_6c35c3a3-31b0-413c-8974-000a7f1bf1ba" xlink:to="loc_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearThree_b50d15dc-0409-4d17-8fb6-f56f7c3fe676" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearFour_15810627-4a3f-405a-9f44-5302855ae22d" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearFour"/>
    <link:calculationArc order="4" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDue_6c35c3a3-31b0-413c-8974-000a7f1bf1ba" xlink:to="loc_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearFour_15810627-4a3f-405a-9f44-5302855ae22d" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearFive_7be9a603-7733-44fc-a299-46a7d9569ab6" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearFive"/>
    <link:calculationArc order="5" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDue_6c35c3a3-31b0-413c-8974-000a7f1bf1ba" xlink:to="loc_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearFive_7be9a603-7733-44fc-a299-46a7d9569ab6" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive_5bb0ec38-398e-4249-885c-612205aa13fa" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive"/>
    <link:calculationArc order="6" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDue_6c35c3a3-31b0-413c-8974-000a7f1bf1ba" xlink:to="loc_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive_5bb0ec38-398e-4249-885c-612205aa13fa" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinanceLeaseLiabilityPaymentsDue_f14bad99-0585-40d9-87e8-66cd11262fc4" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_FinanceLeaseLiabilityPaymentsDue"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinanceLeaseLiabilityPaymentsDueNextTwelveMonths_72bd2708-2d35-4c99-b323-4f5105eba092" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_FinanceLeaseLiabilityPaymentsDueNextTwelveMonths"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_FinanceLeaseLiabilityPaymentsDue_f14bad99-0585-40d9-87e8-66cd11262fc4" xlink:to="loc_us-gaap_FinanceLeaseLiabilityPaymentsDueNextTwelveMonths_72bd2708-2d35-4c99-b323-4f5105eba092" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinanceLeaseLiabilityPaymentsDueYearTwo_45113ddb-ce5e-41de-860a-3dd51f23c226" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_FinanceLeaseLiabilityPaymentsDueYearTwo"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_FinanceLeaseLiabilityPaymentsDue_f14bad99-0585-40d9-87e8-66cd11262fc4" xlink:to="loc_us-gaap_FinanceLeaseLiabilityPaymentsDueYearTwo_45113ddb-ce5e-41de-860a-3dd51f23c226" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinanceLeaseLiabilityPaymentsDueYearThree_25d0dd0d-25c4-441f-9164-24aac07c1954" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_FinanceLeaseLiabilityPaymentsDueYearThree"/>
    <link:calculationArc order="3" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_FinanceLeaseLiabilityPaymentsDue_f14bad99-0585-40d9-87e8-66cd11262fc4" xlink:to="loc_us-gaap_FinanceLeaseLiabilityPaymentsDueYearThree_25d0dd0d-25c4-441f-9164-24aac07c1954" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinanceLeaseLiabilityPaymentsDueYearFour_5cff01c0-463f-4319-aa94-7298b4dfa83c" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_FinanceLeaseLiabilityPaymentsDueYearFour"/>
    <link:calculationArc order="4" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_FinanceLeaseLiabilityPaymentsDue_f14bad99-0585-40d9-87e8-66cd11262fc4" xlink:to="loc_us-gaap_FinanceLeaseLiabilityPaymentsDueYearFour_5cff01c0-463f-4319-aa94-7298b4dfa83c" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinanceLeaseLiabilityPaymentsDueYearFive_aac1dc6f-0bec-4bc3-9363-1e093d8a544d" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_FinanceLeaseLiabilityPaymentsDueYearFive"/>
    <link:calculationArc order="5" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_FinanceLeaseLiabilityPaymentsDue_f14bad99-0585-40d9-87e8-66cd11262fc4" xlink:to="loc_us-gaap_FinanceLeaseLiabilityPaymentsDueYearFive_aac1dc6f-0bec-4bc3-9363-1e093d8a544d" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinanceLeaseLiabilityPaymentsDueAfterYearFive_d44b6f4b-001a-429d-9f50-07c088f2370b" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_FinanceLeaseLiabilityPaymentsDueAfterYearFive"/>
    <link:calculationArc order="6" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_FinanceLeaseLiabilityPaymentsDue_f14bad99-0585-40d9-87e8-66cd11262fc4" xlink:to="loc_us-gaap_FinanceLeaseLiabilityPaymentsDueAfterYearFive_d44b6f4b-001a-429d-9f50-07c088f2370b" xlink:type="arc"/>
  </link:calculationLink>
  <link:roleRef roleURI="http://www.oxy.com/role/LEASECOMMITMENTSOTHERINFORMATIONDetails" xlink:type="simple" xlink:href="oxy-20221231.xsd#LEASECOMMITMENTSOTHERINFORMATIONDetails"/>
  <link:calculationLink xlink:role="http://www.oxy.com/role/LEASECOMMITMENTSOTHERINFORMATIONDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LeaseCost_add0d82f-dc34-49dc-a9f0-2556b80e0d10" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_LeaseCost"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingLeaseCost_9ebb4500-154d-4b4d-b6ee-ac61e564f386" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_OperatingLeaseCost"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_LeaseCost_add0d82f-dc34-49dc-a9f0-2556b80e0d10" xlink:to="loc_us-gaap_OperatingLeaseCost_9ebb4500-154d-4b4d-b6ee-ac61e564f386" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinanceLeaseRightOfUseAssetAmortization_b0e29624-71f7-4f7d-956b-ef26432242de" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_FinanceLeaseRightOfUseAssetAmortization"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_LeaseCost_add0d82f-dc34-49dc-a9f0-2556b80e0d10" xlink:to="loc_us-gaap_FinanceLeaseRightOfUseAssetAmortization_b0e29624-71f7-4f7d-956b-ef26432242de" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinanceLeaseInterestExpense_88d9c6e0-4c69-497e-afcb-e574c8c779bd" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_FinanceLeaseInterestExpense"/>
    <link:calculationArc order="3" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_LeaseCost_add0d82f-dc34-49dc-a9f0-2556b80e0d10" xlink:to="loc_us-gaap_FinanceLeaseInterestExpense_88d9c6e0-4c69-497e-afcb-e574c8c779bd" xlink:type="arc"/>
  </link:calculationLink>
  <link:roleRef roleURI="http://www.oxy.com/role/DERIVATIVESFAIRVALUEDetails" xlink:type="simple" xlink:href="oxy-20221231.xsd#DERIVATIVESFAIRVALUEDetails"/>
  <link:calculationLink xlink:role="http://www.oxy.com/role/DERIVATIVESFAIRVALUEDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeLiabilities_5a952f0c-b854-4efb-9346-fb3af8d26c75" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_DerivativeLiabilities"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeFairValueOfDerivativeLiability_b72607e9-dc8b-4bb9-8b7f-bb2096b8c273" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_DerivativeFairValueOfDerivativeLiability"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_DerivativeLiabilities_5a952f0c-b854-4efb-9346-fb3af8d26c75" xlink:to="loc_us-gaap_DerivativeFairValueOfDerivativeLiability_b72607e9-dc8b-4bb9-8b7f-bb2096b8c273" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeLiabilityFairValueGrossAssetAndRightToReclaimCashOffset_b242be2e-8f7d-4425-bcb8-f9de55f358dc" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_DerivativeLiabilityFairValueGrossAssetAndRightToReclaimCashOffset"/>
    <link:calculationArc order="2" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_DerivativeLiabilities_5a952f0c-b854-4efb-9346-fb3af8d26c75" xlink:to="loc_us-gaap_DerivativeLiabilityFairValueGrossAssetAndRightToReclaimCashOffset_b242be2e-8f7d-4425-bcb8-f9de55f358dc" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeAssets_26d81e20-4052-4211-b787-7326f2fc91ad" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_DerivativeAssets"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeFairValueOfDerivativeAsset_bdedc99a-3a27-45de-92fd-dcd1ed06c55a" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_DerivativeFairValueOfDerivativeAsset"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_DerivativeAssets_26d81e20-4052-4211-b787-7326f2fc91ad" xlink:to="loc_us-gaap_DerivativeFairValueOfDerivativeAsset_bdedc99a-3a27-45de-92fd-dcd1ed06c55a" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeAssetFairValueGrossLiabilityAndObligationToReturnCashOffset_7e1251a5-1a04-4628-bc5a-ebf9d17df25e" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_DerivativeAssetFairValueGrossLiabilityAndObligationToReturnCashOffset"/>
    <link:calculationArc order="2" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_DerivativeAssets_26d81e20-4052-4211-b787-7326f2fc91ad" xlink:to="loc_us-gaap_DerivativeAssetFairValueGrossLiabilityAndObligationToReturnCashOffset_7e1251a5-1a04-4628-bc5a-ebf9d17df25e" xlink:type="arc"/>
  </link:calculationLink>
  <link:roleRef roleURI="http://www.oxy.com/role/INCOMETAXESDOMESTICANDFOREIGNCOMPONENTSOFINCOMELOSSFROMCONTINUINGOPERATIONSDetails" xlink:type="simple" xlink:href="oxy-20221231.xsd#INCOMETAXESDOMESTICANDFOREIGNCOMPONENTSOFINCOMELOSSFROMCONTINUINGOPERATIONSDetails"/>
  <link:calculationLink xlink:role="http://www.oxy.com/role/INCOMETAXESDOMESTICANDFOREIGNCOMPONENTSOFINCOMELOSSFROMCONTINUINGOPERATIONSDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest_d4a238af-b27b-4110-ab71-22140d538781" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest"/>
    <link:loc xlink:type="locator" xlink:label="loc_oxy_IncomeLossFromContinuingOperationsBeforeIncomeTaxesAfterIncomeLossFromEquityMethodInvestmentsDomestic_b9966206-e7da-48b4-a306-9471c7d40b03" xlink:href="oxy-20221231.xsd#oxy_IncomeLossFromContinuingOperationsBeforeIncomeTaxesAfterIncomeLossFromEquityMethodInvestmentsDomestic"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest_d4a238af-b27b-4110-ab71-22140d538781" xlink:to="loc_oxy_IncomeLossFromContinuingOperationsBeforeIncomeTaxesAfterIncomeLossFromEquityMethodInvestmentsDomestic_b9966206-e7da-48b4-a306-9471c7d40b03" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_oxy_IncomeLossFromContinuingOperationsBeforeIncomeTaxesAfterIncomeLossFromEquityMethodInvestmentsForeign_456392c6-3d76-4773-b87c-97e10fe4e2f7" xlink:href="oxy-20221231.xsd#oxy_IncomeLossFromContinuingOperationsBeforeIncomeTaxesAfterIncomeLossFromEquityMethodInvestmentsForeign"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest_d4a238af-b27b-4110-ab71-22140d538781" xlink:to="loc_oxy_IncomeLossFromContinuingOperationsBeforeIncomeTaxesAfterIncomeLossFromEquityMethodInvestmentsForeign_456392c6-3d76-4773-b87c-97e10fe4e2f7" xlink:type="arc"/>
  </link:calculationLink>
  <link:roleRef roleURI="http://www.oxy.com/role/INCOMETAXESCOMPONENTSOFINCOMETAXEXPENSEBENEFITDetails" xlink:type="simple" xlink:href="oxy-20221231.xsd#INCOMETAXESCOMPONENTSOFINCOMETAXEXPENSEBENEFITDetails"/>
  <link:calculationLink xlink:role="http://www.oxy.com/role/INCOMETAXESCOMPONENTSOFINCOMETAXEXPENSEBENEFITDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CurrentIncomeTaxExpenseBenefit_0215ab86-38c0-4b4d-a9eb-17ed70f1ffbb" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_CurrentIncomeTaxExpenseBenefit"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CurrentFederalTaxExpenseBenefit_a338b72c-5ecb-408f-86ce-18a892f8ff36" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_CurrentFederalTaxExpenseBenefit"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_CurrentIncomeTaxExpenseBenefit_0215ab86-38c0-4b4d-a9eb-17ed70f1ffbb" xlink:to="loc_us-gaap_CurrentFederalTaxExpenseBenefit_a338b72c-5ecb-408f-86ce-18a892f8ff36" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CurrentStateAndLocalTaxExpenseBenefit_de1634ed-bd86-44d2-b556-40d0fec64c2f" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_CurrentStateAndLocalTaxExpenseBenefit"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_CurrentIncomeTaxExpenseBenefit_0215ab86-38c0-4b4d-a9eb-17ed70f1ffbb" xlink:to="loc_us-gaap_CurrentStateAndLocalTaxExpenseBenefit_de1634ed-bd86-44d2-b556-40d0fec64c2f" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CurrentForeignTaxExpenseBenefit_4256192d-c20c-4f02-8fee-896efb733ad3" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_CurrentForeignTaxExpenseBenefit"/>
    <link:calculationArc order="3" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_CurrentIncomeTaxExpenseBenefit_0215ab86-38c0-4b4d-a9eb-17ed70f1ffbb" xlink:to="loc_us-gaap_CurrentForeignTaxExpenseBenefit_4256192d-c20c-4f02-8fee-896efb733ad3" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredIncomeTaxExpenseBenefit_44a2d493-890d-4f55-a68b-0f70f38ff746" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_DeferredIncomeTaxExpenseBenefit"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredFederalIncomeTaxExpenseBenefit_0f66c060-4c55-4cdb-b646-f76de36f1022" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_DeferredFederalIncomeTaxExpenseBenefit"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_DeferredIncomeTaxExpenseBenefit_44a2d493-890d-4f55-a68b-0f70f38ff746" xlink:to="loc_us-gaap_DeferredFederalIncomeTaxExpenseBenefit_0f66c060-4c55-4cdb-b646-f76de36f1022" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredStateAndLocalIncomeTaxExpenseBenefit_551009b4-1a45-4d8e-88b0-4440b455859d" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_DeferredStateAndLocalIncomeTaxExpenseBenefit"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_DeferredIncomeTaxExpenseBenefit_44a2d493-890d-4f55-a68b-0f70f38ff746" xlink:to="loc_us-gaap_DeferredStateAndLocalIncomeTaxExpenseBenefit_551009b4-1a45-4d8e-88b0-4440b455859d" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredForeignIncomeTaxExpenseBenefit_5d275902-48a2-4734-844c-c059819bd176" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_DeferredForeignIncomeTaxExpenseBenefit"/>
    <link:calculationArc order="3" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_DeferredIncomeTaxExpenseBenefit_44a2d493-890d-4f55-a68b-0f70f38ff746" xlink:to="loc_us-gaap_DeferredForeignIncomeTaxExpenseBenefit_5d275902-48a2-4734-844c-c059819bd176" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeTaxExpenseBenefit_33993d77-51b1-42c6-8e5f-70b1c19389c3" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_IncomeTaxExpenseBenefit"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CurrentIncomeTaxExpenseBenefit_22691207-63ab-4594-9839-4471aa3f12bf" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_CurrentIncomeTaxExpenseBenefit"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_IncomeTaxExpenseBenefit_33993d77-51b1-42c6-8e5f-70b1c19389c3" xlink:to="loc_us-gaap_CurrentIncomeTaxExpenseBenefit_22691207-63ab-4594-9839-4471aa3f12bf" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredIncomeTaxExpenseBenefit_8f74f176-eb12-46cc-91c5-fe68284c2cef" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_DeferredIncomeTaxExpenseBenefit"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_IncomeTaxExpenseBenefit_33993d77-51b1-42c6-8e5f-70b1c19389c3" xlink:to="loc_us-gaap_DeferredIncomeTaxExpenseBenefit_8f74f176-eb12-46cc-91c5-fe68284c2cef" xlink:type="arc"/>
  </link:calculationLink>
  <link:roleRef roleURI="http://www.oxy.com/role/INCOMETAXESEFFECTIVETAXRATERECONCILIATIONDetails" xlink:type="simple" xlink:href="oxy-20221231.xsd#INCOMETAXESEFFECTIVETAXRATERECONCILIATIONDetails"/>
  <link:calculationLink xlink:role="http://www.oxy.com/role/INCOMETAXESEFFECTIVETAXRATERECONCILIATIONDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EffectiveIncomeTaxRateContinuingOperations_e2d1ede3-ef67-461d-b7e6-c97845720ec3" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_EffectiveIncomeTaxRateContinuingOperations"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes_7d996c44-e533-40e4-9944-855304b0d0ca" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_EffectiveIncomeTaxRateContinuingOperations_e2d1ede3-ef67-461d-b7e6-c97845720ec3" xlink:to="loc_us-gaap_EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes_7d996c44-e533-40e4-9944-855304b0d0ca" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_oxy_EffectiveIncomeTaxRateReconciliationCapitalLossCarrybackPercent_573027cd-c857-4663-bed6-a24a89b9f821" xlink:href="oxy-20221231.xsd#oxy_EffectiveIncomeTaxRateReconciliationCapitalLossCarrybackPercent"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_EffectiveIncomeTaxRateContinuingOperations_e2d1ede3-ef67-461d-b7e6-c97845720ec3" xlink:to="loc_oxy_EffectiveIncomeTaxRateReconciliationCapitalLossCarrybackPercent_573027cd-c857-4663-bed6-a24a89b9f821" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EffectiveIncomeTaxRateReconciliationOtherAdjustments_81a54b4a-b93a-40cd-b3de-7b74a3145276" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_EffectiveIncomeTaxRateReconciliationOtherAdjustments"/>
    <link:calculationArc order="3" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_EffectiveIncomeTaxRateContinuingOperations_e2d1ede3-ef67-461d-b7e6-c97845720ec3" xlink:to="loc_us-gaap_EffectiveIncomeTaxRateReconciliationOtherAdjustments_81a54b4a-b93a-40cd-b3de-7b74a3145276" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate_ccda1ede-4113-4ce4-85f5-fe2f207db7b7" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate"/>
    <link:calculationArc order="4" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_EffectiveIncomeTaxRateContinuingOperations_e2d1ede3-ef67-461d-b7e6-c97845720ec3" xlink:to="loc_us-gaap_EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate_ccda1ede-4113-4ce4-85f5-fe2f207db7b7" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_oxy_EffectiveIncomeTaxRateReconciliationEnhancedOilRecoveryCredit_4bbf8b5a-d71a-4289-aabe-cf2b001aee67" xlink:href="oxy-20221231.xsd#oxy_EffectiveIncomeTaxRateReconciliationEnhancedOilRecoveryCredit"/>
    <link:calculationArc order="5" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_EffectiveIncomeTaxRateContinuingOperations_e2d1ede3-ef67-461d-b7e6-c97845720ec3" xlink:to="loc_oxy_EffectiveIncomeTaxRateReconciliationEnhancedOilRecoveryCredit_4bbf8b5a-d71a-4289-aabe-cf2b001aee67" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EffectiveIncomeTaxRateReconciliationChangeInEnactedTaxRate_caff32d5-6a4c-48bd-bd93-0bcf0d1bd6ed" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_EffectiveIncomeTaxRateReconciliationChangeInEnactedTaxRate"/>
    <link:calculationArc order="6" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_EffectiveIncomeTaxRateContinuingOperations_e2d1ede3-ef67-461d-b7e6-c97845720ec3" xlink:to="loc_us-gaap_EffectiveIncomeTaxRateReconciliationChangeInEnactedTaxRate_caff32d5-6a4c-48bd-bd93-0bcf0d1bd6ed" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EffectiveIncomeTaxRateReconciliationNondeductibleExpenseRestructuringCharges_efad81aa-3788-4ff5-bde0-5ab02a5150e1" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_EffectiveIncomeTaxRateReconciliationNondeductibleExpenseRestructuringCharges"/>
    <link:calculationArc order="7" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_EffectiveIncomeTaxRateContinuingOperations_e2d1ede3-ef67-461d-b7e6-c97845720ec3" xlink:to="loc_us-gaap_EffectiveIncomeTaxRateReconciliationNondeductibleExpenseRestructuringCharges_efad81aa-3788-4ff5-bde0-5ab02a5150e1" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EffectiveIncomeTaxRateReconciliationForeignIncomeTaxRateDifferential_a6eb6384-24e8-4bfb-a086-bc42791729bc" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_EffectiveIncomeTaxRateReconciliationForeignIncomeTaxRateDifferential"/>
    <link:calculationArc order="8" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_EffectiveIncomeTaxRateContinuingOperations_e2d1ede3-ef67-461d-b7e6-c97845720ec3" xlink:to="loc_us-gaap_EffectiveIncomeTaxRateReconciliationForeignIncomeTaxRateDifferential_a6eb6384-24e8-4bfb-a086-bc42791729bc" xlink:type="arc"/>
  </link:calculationLink>
  <link:roleRef roleURI="http://www.oxy.com/role/INCOMETAXESCOMPONENTSOFDEFERREDTAXASSETSANDLIABILITIESDetails" xlink:type="simple" xlink:href="oxy-20221231.xsd#INCOMETAXESCOMPONENTSOFDEFERREDTAXASSETSANDLIABILITIESDetails"/>
  <link:calculationLink xlink:role="http://www.oxy.com/role/INCOMETAXESCOMPONENTSOFDEFERREDTAXASSETSANDLIABILITIESDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredTaxAssetsNet_7eca5522-31cb-4a76-97da-269ca470e9c8" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_DeferredTaxAssetsNet"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredTaxAssetsGross_ef669281-3631-4965-8226-a9cebb7d6445" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_DeferredTaxAssetsGross"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_DeferredTaxAssetsNet_7eca5522-31cb-4a76-97da-269ca470e9c8" xlink:to="loc_us-gaap_DeferredTaxAssetsGross_ef669281-3631-4965-8226-a9cebb7d6445" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredTaxAssetsValuationAllowance_cc574d7b-95f1-43d6-ba9d-2804a0557603" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_DeferredTaxAssetsValuationAllowance"/>
    <link:calculationArc order="2" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_DeferredTaxAssetsNet_7eca5522-31cb-4a76-97da-269ca470e9c8" xlink:to="loc_us-gaap_DeferredTaxAssetsValuationAllowance_cc574d7b-95f1-43d6-ba9d-2804a0557603" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredTaxLiabilities_3d7be5e8-f75f-4ee9-a43a-abf78b018bcd" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_DeferredTaxLiabilities"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredIncomeTaxLiabilities_71216638-568f-4fc5-8ade-aca1bee8e091" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_DeferredIncomeTaxLiabilities"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_DeferredTaxLiabilities_3d7be5e8-f75f-4ee9-a43a-abf78b018bcd" xlink:to="loc_us-gaap_DeferredIncomeTaxLiabilities_71216638-568f-4fc5-8ade-aca1bee8e091" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredTaxAssetsNet_dd2ab75b-de29-4d7f-8f2d-918132361f31" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_DeferredTaxAssetsNet"/>
    <link:calculationArc order="2" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_DeferredTaxLiabilities_3d7be5e8-f75f-4ee9-a43a-abf78b018bcd" xlink:to="loc_us-gaap_DeferredTaxAssetsNet_dd2ab75b-de29-4d7f-8f2d-918132361f31" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredIncomeTaxLiabilities_d76dec8c-3865-4c59-b8c5-661378bc970f" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_DeferredIncomeTaxLiabilities"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredTaxLiabilitiesPropertyPlantAndEquipment_4ab7f6fa-4d12-451c-bffc-88c8d06e531a" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_DeferredTaxLiabilitiesPropertyPlantAndEquipment"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_DeferredIncomeTaxLiabilities_d76dec8c-3865-4c59-b8c5-661378bc970f" xlink:to="loc_us-gaap_DeferredTaxLiabilitiesPropertyPlantAndEquipment_4ab7f6fa-4d12-451c-bffc-88c8d06e531a" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_oxy_DeferredTaxLiabilitiesEquityInvestmentsPartnershipsAndForeignSubsidiaries_7a79ac42-baf9-4ce6-b38e-dd40014a91c0" xlink:href="oxy-20221231.xsd#oxy_DeferredTaxLiabilitiesEquityInvestmentsPartnershipsAndForeignSubsidiaries"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_DeferredIncomeTaxLiabilities_d76dec8c-3865-4c59-b8c5-661378bc970f" xlink:to="loc_oxy_DeferredTaxLiabilitiesEquityInvestmentsPartnershipsAndForeignSubsidiaries_7a79ac42-baf9-4ce6-b38e-dd40014a91c0" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredTaxAssetsGross_4b5c3953-e931-4929-a164-8c977097fdd4" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_DeferredTaxAssetsGross"/>
    <link:loc xlink:type="locator" xlink:label="loc_oxy_DeferredTaxAssetsEnvironmentalReserves_459740a3-587c-4ca3-9277-3f20802dc483" xlink:href="oxy-20221231.xsd#oxy_DeferredTaxAssetsEnvironmentalReserves"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_DeferredTaxAssetsGross_4b5c3953-e931-4929-a164-8c977097fdd4" xlink:to="loc_oxy_DeferredTaxAssetsEnvironmentalReserves_459740a3-587c-4ca3-9277-3f20802dc483" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsPostretirementBenefits_5494fbf4-dddd-426a-97ce-35c3db5a7ab2" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsPostretirementBenefits"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_DeferredTaxAssetsGross_4b5c3953-e931-4929-a164-8c977097fdd4" xlink:to="loc_us-gaap_DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsPostretirementBenefits_5494fbf4-dddd-426a-97ce-35c3db5a7ab2" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefits_be63a2cb-eb05-4ccb-a5aa-0ac6b6421686" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefits"/>
    <link:calculationArc order="3" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_DeferredTaxAssetsGross_4b5c3953-e931-4929-a164-8c977097fdd4" xlink:to="loc_us-gaap_DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefits_be63a2cb-eb05-4ccb-a5aa-0ac6b6421686" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsAssetRetirementObligations_36981d94-98da-4219-a035-a5ab454d74f8" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsAssetRetirementObligations"/>
    <link:calculationArc order="4" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_DeferredTaxAssetsGross_4b5c3953-e931-4929-a164-8c977097fdd4" xlink:to="loc_us-gaap_DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsAssetRetirementObligations_36981d94-98da-4219-a035-a5ab454d74f8" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredTaxAssetsTaxCreditCarryforwardsForeign_fbcd298a-fb4c-42d0-9008-aef5f19a66da" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_DeferredTaxAssetsTaxCreditCarryforwardsForeign"/>
    <link:calculationArc order="5" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_DeferredTaxAssetsGross_4b5c3953-e931-4929-a164-8c977097fdd4" xlink:to="loc_us-gaap_DeferredTaxAssetsTaxCreditCarryforwardsForeign_fbcd298a-fb4c-42d0-9008-aef5f19a66da" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredTaxAssetsTaxCreditCarryforwardsGeneralBusiness_9900866a-ee6b-4a7c-89df-e0fa0c2d462d" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_DeferredTaxAssetsTaxCreditCarryforwardsGeneralBusiness"/>
    <link:calculationArc order="6" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_DeferredTaxAssetsGross_4b5c3953-e931-4929-a164-8c977097fdd4" xlink:to="loc_us-gaap_DeferredTaxAssetsTaxCreditCarryforwardsGeneralBusiness_9900866a-ee6b-4a7c-89df-e0fa0c2d462d" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredTaxAssetsOperatingLossCarryforwards_456e5f15-8e23-4f7b-ade8-9adb24daafd9" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_DeferredTaxAssetsOperatingLossCarryforwards"/>
    <link:calculationArc order="7" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_DeferredTaxAssetsGross_4b5c3953-e931-4929-a164-8c977097fdd4" xlink:to="loc_us-gaap_DeferredTaxAssetsOperatingLossCarryforwards_456e5f15-8e23-4f7b-ade8-9adb24daafd9" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredTaxAssetInterestCarryforward_0ea21373-0544-4ab7-8b76-b644c7d99497" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_DeferredTaxAssetInterestCarryforward"/>
    <link:calculationArc order="8" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_DeferredTaxAssetsGross_4b5c3953-e931-4929-a164-8c977097fdd4" xlink:to="loc_us-gaap_DeferredTaxAssetInterestCarryforward_0ea21373-0544-4ab7-8b76-b644c7d99497" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredTaxAssetsOther_6c1b7b90-e8d7-4407-9707-413ff7590738" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_DeferredTaxAssetsOther"/>
    <link:calculationArc order="9" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_DeferredTaxAssetsGross_4b5c3953-e931-4929-a164-8c977097fdd4" xlink:to="loc_us-gaap_DeferredTaxAssetsOther_6c1b7b90-e8d7-4407-9707-413ff7590738" xlink:type="arc"/>
  </link:calculationLink>
  <link:roleRef roleURI="http://www.oxy.com/role/INCOMETAXESCOMPONENTSOFDEFERREDTAXASSETSANDLIABILITIESDetails_1" xlink:type="simple" xlink:href="oxy-20221231.xsd#INCOMETAXESCOMPONENTSOFDEFERREDTAXASSETSANDLIABILITIESDetails_1"/>
  <link:calculationLink xlink:role="http://www.oxy.com/role/INCOMETAXESCOMPONENTSOFDEFERREDTAXASSETSANDLIABILITIESDetails_1" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredTaxLiabilities_b7bcb5a2-f36c-4418-8697-0def6000a363" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_DeferredTaxLiabilities"/>
    <link:loc xlink:type="locator" xlink:label="loc_oxy_DeferredTaxAssetForeignLongTermReceivablesAndNoncurrentAssetsNet_44a75e8d-5890-4036-9f2a-245aa1b0c700" xlink:href="oxy-20221231.xsd#oxy_DeferredTaxAssetForeignLongTermReceivablesAndNoncurrentAssetsNet"/>
    <link:calculationArc order="1" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_DeferredTaxLiabilities_b7bcb5a2-f36c-4418-8697-0def6000a363" xlink:to="loc_oxy_DeferredTaxAssetForeignLongTermReceivablesAndNoncurrentAssetsNet_44a75e8d-5890-4036-9f2a-245aa1b0c700" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredIncomeTaxLiabilitiesNet_0d9f7d65-7734-4e7a-a2b2-f70c6720f8f9" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_DeferredIncomeTaxLiabilitiesNet"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_DeferredTaxLiabilities_b7bcb5a2-f36c-4418-8697-0def6000a363" xlink:to="loc_us-gaap_DeferredIncomeTaxLiabilitiesNet_0d9f7d65-7734-4e7a-a2b2-f70c6720f8f9" xlink:type="arc"/>
  </link:calculationLink>
  <link:roleRef roleURI="http://www.oxy.com/role/RETIREMENTANDPOSTRETIREMENTBENEFITPLANSOBLIGATIONSANDFUNDEDSTATUSDetails" xlink:type="simple" xlink:href="oxy-20221231.xsd#RETIREMENTANDPOSTRETIREMENTBENEFITPLANSOBLIGATIONSANDFUNDEDSTATUSDetails"/>
  <link:calculationLink xlink:role="http://www.oxy.com/role/RETIREMENTANDPOSTRETIREMENTBENEFITPLANSOBLIGATIONSANDFUNDEDSTATUSDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DefinedBenefitPlanAmountsRecognizedInBalanceSheet_4e451d36-838b-4b2d-ac61-69a20c818810" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_DefinedBenefitPlanAmountsRecognizedInBalanceSheet"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DefinedBenefitPlanAssetsForPlanBenefitsNoncurrent_189011f4-8808-4358-aed0-286321bf19e6" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_DefinedBenefitPlanAssetsForPlanBenefitsNoncurrent"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_DefinedBenefitPlanAmountsRecognizedInBalanceSheet_4e451d36-838b-4b2d-ac61-69a20c818810" xlink:to="loc_us-gaap_DefinedBenefitPlanAssetsForPlanBenefitsNoncurrent_189011f4-8808-4358-aed0-286321bf19e6" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PensionAndOtherPostretirementDefinedBenefitPlansCurrentLiabilities_f3a25980-41c3-4acd-b0f6-149de6800e47" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_PensionAndOtherPostretirementDefinedBenefitPlansCurrentLiabilities"/>
    <link:calculationArc order="2" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_DefinedBenefitPlanAmountsRecognizedInBalanceSheet_4e451d36-838b-4b2d-ac61-69a20c818810" xlink:to="loc_us-gaap_PensionAndOtherPostretirementDefinedBenefitPlansCurrentLiabilities_f3a25980-41c3-4acd-b0f6-149de6800e47" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesNoncurrent_279f2808-512e-46a0-8f8b-7193c3d41b8b" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesNoncurrent"/>
    <link:calculationArc order="3" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_DefinedBenefitPlanAmountsRecognizedInBalanceSheet_4e451d36-838b-4b2d-ac61-69a20c818810" xlink:to="loc_us-gaap_PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesNoncurrent_279f2808-512e-46a0-8f8b-7193c3d41b8b" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossDefinedBenefitPensionAndOtherPostretirementPlansNetOfTax_f682c932-2577-4131-87e9-245b43248fe9" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_AccumulatedOtherComprehensiveIncomeLossDefinedBenefitPensionAndOtherPostretirementPlansNetOfTax"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeNetGainsLossesAfterTax_2bcf6576-fb5f-465c-8497-761a5ad3b197" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeNetGainsLossesAfterTax"/>
    <link:calculationArc order="1" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossDefinedBenefitPensionAndOtherPostretirementPlansNetOfTax_f682c932-2577-4131-87e9-245b43248fe9" xlink:to="loc_us-gaap_DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeNetGainsLossesAfterTax_2bcf6576-fb5f-465c-8497-761a5ad3b197" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeNetPriorServiceCostCreditAfterTax_275acb3c-92b9-4633-a663-3054f2ee7de4" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeNetPriorServiceCostCreditAfterTax"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossDefinedBenefitPensionAndOtherPostretirementPlansNetOfTax_f682c932-2577-4131-87e9-245b43248fe9" xlink:to="loc_us-gaap_DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeNetPriorServiceCostCreditAfterTax_275acb3c-92b9-4633-a663-3054f2ee7de4" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DefinedBenefitPlanFundedStatusOfPlan_3b06d260-cfc2-44ea-b52f-41a697a3cfa6" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_DefinedBenefitPlanFundedStatusOfPlan"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DefinedBenefitPlanBenefitObligation_bb60745c-b280-48b5-ac78-f362b00792a9" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_DefinedBenefitPlanBenefitObligation"/>
    <link:calculationArc order="1" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_DefinedBenefitPlanFundedStatusOfPlan_3b06d260-cfc2-44ea-b52f-41a697a3cfa6" xlink:to="loc_us-gaap_DefinedBenefitPlanBenefitObligation_bb60745c-b280-48b5-ac78-f362b00792a9" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_oxy_DefinedBenefitPlanPlanAssetsAmountExcludingNetPayables_61747e71-fdd7-4194-aed2-435055b7c380" xlink:href="oxy-20221231.xsd#oxy_DefinedBenefitPlanPlanAssetsAmountExcludingNetPayables"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_DefinedBenefitPlanFundedStatusOfPlan_3b06d260-cfc2-44ea-b52f-41a697a3cfa6" xlink:to="loc_oxy_DefinedBenefitPlanPlanAssetsAmountExcludingNetPayables_61747e71-fdd7-4194-aed2-435055b7c380" xlink:type="arc"/>
  </link:calculationLink>
  <link:roleRef roleURI="http://www.oxy.com/role/RETIREMENTANDPOSTRETIREMENTBENEFITPLANSCOMPONENTSOFNETPERIODICBENEFITCOSTDetails" xlink:type="simple" xlink:href="oxy-20221231.xsd#RETIREMENTANDPOSTRETIREMENTBENEFITPLANSCOMPONENTSOFNETPERIODICBENEFITCOSTDetails"/>
  <link:calculationLink xlink:role="http://www.oxy.com/role/RETIREMENTANDPOSTRETIREMENTBENEFITPLANSCOMPONENTSOFNETPERIODICBENEFITCOSTDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DefinedBenefitPlanNetPeriodicBenefitCost_81dbd355-05d2-4331-b95e-1f169388559f" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_DefinedBenefitPlanNetPeriodicBenefitCost"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DefinedBenefitPlanServiceCost_99cd06ed-a31d-4191-8425-741ecd5c7922" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_DefinedBenefitPlanServiceCost"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_DefinedBenefitPlanNetPeriodicBenefitCost_81dbd355-05d2-4331-b95e-1f169388559f" xlink:to="loc_us-gaap_DefinedBenefitPlanServiceCost_99cd06ed-a31d-4191-8425-741ecd5c7922" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DefinedBenefitPlanInterestCost_529eca43-56e5-46c9-a657-0de483269478" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_DefinedBenefitPlanInterestCost"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_DefinedBenefitPlanNetPeriodicBenefitCost_81dbd355-05d2-4331-b95e-1f169388559f" xlink:to="loc_us-gaap_DefinedBenefitPlanInterestCost_529eca43-56e5-46c9-a657-0de483269478" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DefinedBenefitPlanExpectedReturnOnPlanAssets_f3cf638c-0569-405a-a945-5a0f9eadadcb" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_DefinedBenefitPlanExpectedReturnOnPlanAssets"/>
    <link:calculationArc order="3" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_DefinedBenefitPlanNetPeriodicBenefitCost_81dbd355-05d2-4331-b95e-1f169388559f" xlink:to="loc_us-gaap_DefinedBenefitPlanExpectedReturnOnPlanAssets_f3cf638c-0569-405a-a945-5a0f9eadadcb" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DefinedBenefitPlanAmortizationOfGainsLosses_d1625438-0f11-4533-92e7-b05405fa4118" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_DefinedBenefitPlanAmortizationOfGainsLosses"/>
    <link:calculationArc order="4" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_DefinedBenefitPlanNetPeriodicBenefitCost_81dbd355-05d2-4331-b95e-1f169388559f" xlink:to="loc_us-gaap_DefinedBenefitPlanAmortizationOfGainsLosses_d1625438-0f11-4533-92e7-b05405fa4118" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_oxy_DefinedBenefitPlanOtherCostsAndAdjustments_ef204b72-7584-4b56-8da6-95474be3f9a7" xlink:href="oxy-20221231.xsd#oxy_DefinedBenefitPlanOtherCostsAndAdjustments"/>
    <link:calculationArc order="5" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_DefinedBenefitPlanNetPeriodicBenefitCost_81dbd355-05d2-4331-b95e-1f169388559f" xlink:to="loc_oxy_DefinedBenefitPlanOtherCostsAndAdjustments_ef204b72-7584-4b56-8da6-95474be3f9a7" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DefinedBenefitPlanAmortizationOfPriorServiceCostCredit_d08b8ade-0067-4d4a-a9f7-14436462e845" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_DefinedBenefitPlanAmortizationOfPriorServiceCostCredit"/>
    <link:calculationArc order="6" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_DefinedBenefitPlanNetPeriodicBenefitCost_81dbd355-05d2-4331-b95e-1f169388559f" xlink:to="loc_us-gaap_DefinedBenefitPlanAmortizationOfPriorServiceCostCredit_d08b8ade-0067-4d4a-a9f7-14436462e845" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DefinedBenefitPlanRecognizedNetGainLossDueToSettlements1_e342533a-47ce-455f-b7bd-cafde3eb7e44" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_DefinedBenefitPlanRecognizedNetGainLossDueToSettlements1"/>
    <link:calculationArc order="7" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_DefinedBenefitPlanNetPeriodicBenefitCost_81dbd355-05d2-4331-b95e-1f169388559f" xlink:to="loc_us-gaap_DefinedBenefitPlanRecognizedNetGainLossDueToSettlements1_e342533a-47ce-455f-b7bd-cafde3eb7e44" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DefinedBenefitPlanRecognizedNetGainLossDueToCurtailments_1917587d-c5e0-460f-a85e-1d5ad247f787" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_DefinedBenefitPlanRecognizedNetGainLossDueToCurtailments"/>
    <link:calculationArc order="8" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_DefinedBenefitPlanNetPeriodicBenefitCost_81dbd355-05d2-4331-b95e-1f169388559f" xlink:to="loc_us-gaap_DefinedBenefitPlanRecognizedNetGainLossDueToCurtailments_1917587d-c5e0-460f-a85e-1d5ad247f787" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DefinedBenefitPlanCostOfProvidingSpecialOrContractualTerminationBenefitRecognizedDuringPeriod_f12a69d0-9ed9-4060-a117-df227861e449" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_DefinedBenefitPlanCostOfProvidingSpecialOrContractualTerminationBenefitRecognizedDuringPeriod"/>
    <link:calculationArc order="9" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_DefinedBenefitPlanNetPeriodicBenefitCost_81dbd355-05d2-4331-b95e-1f169388559f" xlink:to="loc_us-gaap_DefinedBenefitPlanCostOfProvidingSpecialOrContractualTerminationBenefitRecognizedDuringPeriod_f12a69d0-9ed9-4060-a117-df227861e449" xlink:type="arc"/>
  </link:calculationLink>
  <link:roleRef roleURI="http://www.oxy.com/role/STOCKHOLDERSEQUITYBASICANDDILUTEDEPSDetails" xlink:type="simple" xlink:href="oxy-20221231.xsd#STOCKHOLDERSEQUITYBASICANDDILUTEDEPSDetails"/>
  <link:calculationLink xlink:role="http://www.oxy.com/role/STOCKHOLDERSEQUITYBASICANDDILUTEDEPSDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding_d1d1c88b-6fdd-4a19-a730-9ef5a9b578ea" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_WeightedAverageNumberDilutedSharesOutstandingAdjustment_08446d93-5c61-4e82-96e4-34a43aed7904" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_WeightedAverageNumberDilutedSharesOutstandingAdjustment"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding_d1d1c88b-6fdd-4a19-a730-9ef5a9b578ea" xlink:to="loc_us-gaap_WeightedAverageNumberDilutedSharesOutstandingAdjustment_08446d93-5c61-4e82-96e4-34a43aed7904" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_WeightedAverageNumberOfSharesOutstandingBasic_2f3dc043-f24e-433f-bd58-c787cd242c1e" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_WeightedAverageNumberOfSharesOutstandingBasic"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding_d1d1c88b-6fdd-4a19-a730-9ef5a9b578ea" xlink:to="loc_us-gaap_WeightedAverageNumberOfSharesOutstandingBasic_2f3dc043-f24e-433f-bd58-c787cd242c1e" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic_e060e455-9aa2-42eb-8529-ab1a4361a036" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_UndistributedEarningsLossAllocatedToParticipatingSecuritiesBasic_9d38dda9-df1d-42a9-952f-bea44ecde47d" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_UndistributedEarningsLossAllocatedToParticipatingSecuritiesBasic"/>
    <link:calculationArc order="1" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic_e060e455-9aa2-42eb-8529-ab1a4361a036" xlink:to="loc_us-gaap_UndistributedEarningsLossAllocatedToParticipatingSecuritiesBasic_9d38dda9-df1d-42a9-952f-bea44ecde47d" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_oxy_NetIncomeLossAttributableToCommonStockholders_a99816d3-7b2a-4880-9da1-140719ef4ce1" xlink:href="oxy-20221231.xsd#oxy_NetIncomeLossAttributableToCommonStockholders"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic_e060e455-9aa2-42eb-8529-ab1a4361a036" xlink:to="loc_oxy_NetIncomeLossAttributableToCommonStockholders_a99816d3-7b2a-4880-9da1-140719ef4ce1" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetIncomeLossAvailableToCommonStockholdersDiluted_adf5a97c-23fc-4bbe-9773-66af32f2a511" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_NetIncomeLossAvailableToCommonStockholdersDiluted"/>
    <link:loc xlink:type="locator" xlink:label="loc_oxy_NetIncomeLossAttributableToCommonStockholders_a80e9eb6-141b-4fe2-bce7-219ca7599740" xlink:href="oxy-20221231.xsd#oxy_NetIncomeLossAttributableToCommonStockholders"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetIncomeLossAvailableToCommonStockholdersDiluted_adf5a97c-23fc-4bbe-9773-66af32f2a511" xlink:to="loc_oxy_NetIncomeLossAttributableToCommonStockholders_a80e9eb6-141b-4fe2-bce7-219ca7599740" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_UndistributedEarningsLossAllocatedToParticipatingSecuritiesDiluted_c458db09-13bb-4049-b662-f477432f6995" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_UndistributedEarningsLossAllocatedToParticipatingSecuritiesDiluted"/>
    <link:calculationArc order="2" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetIncomeLossAvailableToCommonStockholdersDiluted_adf5a97c-23fc-4bbe-9773-66af32f2a511" xlink:to="loc_us-gaap_UndistributedEarningsLossAllocatedToParticipatingSecuritiesDiluted_c458db09-13bb-4049-b662-f477432f6995" xlink:type="arc"/>
  </link:calculationLink>
</link:linkbase>
