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

<!--XBRL Document Created with the Workiva Platform-->
<!--Copyright 2023 Workiva-->
<!--r:9b587981-7d49-4d79-bd9a-5e53100f802e,g:0ded78a0-ec92-421b-a5e4-045b18119434-->
<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.brandywinerealty.com/role/CONSOLIDATEDBALANCESHEETS" xlink:type="simple" xlink:href="bdn-20230630.xsd#CONSOLIDATEDBALANCESHEETS"/>
  <link:calculationLink xlink:role="http://www.brandywinerealty.com/role/CONSOLIDATEDBALANCESHEETS" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LiabilitiesAndStockholdersEquity_36ea4971-42cd-486c-8b24-16e71f662d55" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_LiabilitiesAndStockholdersEquity"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_Liabilities_6b9788a5-7bf9-44d8-80a4-f48788ec94db" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_Liabilities"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_LiabilitiesAndStockholdersEquity_36ea4971-42cd-486c-8b24-16e71f662d55" xlink:to="loc_us-gaap_Liabilities_6b9788a5-7bf9-44d8-80a4-f48788ec94db" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommitmentsAndContingencies_3bbfae47-c8a3-49e1-bef6-f40d98a5fb0e" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_CommitmentsAndContingencies"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_LiabilitiesAndStockholdersEquity_36ea4971-42cd-486c-8b24-16e71f662d55" xlink:to="loc_us-gaap_CommitmentsAndContingencies_3bbfae47-c8a3-49e1-bef6-f40d98a5fb0e" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest_97439824-64f9-46df-9546-5e0e0b492c4f" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest"/>
    <link:calculationArc order="3" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_LiabilitiesAndStockholdersEquity_36ea4971-42cd-486c-8b24-16e71f662d55" xlink:to="loc_us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest_97439824-64f9-46df-9546-5e0e0b492c4f" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RealEstateInvestmentPropertyNet_533adf4b-e28d-4397-86a2-1b77895fe873" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_RealEstateInvestmentPropertyNet"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LandAvailableForDevelopment_6ba61e87-aefc-4d7f-8853-1469833c678f" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_LandAvailableForDevelopment"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_RealEstateInvestmentPropertyNet_533adf4b-e28d-4397-86a2-1b77895fe873" xlink:to="loc_us-gaap_LandAvailableForDevelopment_6ba61e87-aefc-4d7f-8853-1469833c678f" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_bdn_OperatingRealEstateInvestmentPropertyNet_9cc1daab-588f-4893-9a60-57ab28faf003" xlink:href="bdn-20230630.xsd#bdn_OperatingRealEstateInvestmentPropertyNet"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_RealEstateInvestmentPropertyNet_533adf4b-e28d-4397-86a2-1b77895fe873" xlink:to="loc_bdn_OperatingRealEstateInvestmentPropertyNet_9cc1daab-588f-4893-9a60-57ab28faf003" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DevelopmentInProcess_7863a06e-93ff-4357-a380-6d6f2c367f45" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DevelopmentInProcess"/>
    <link:calculationArc order="3" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_RealEstateInvestmentPropertyNet_533adf4b-e28d-4397-86a2-1b77895fe873" xlink:to="loc_us-gaap_DevelopmentInProcess_7863a06e-93ff-4357-a380-6d6f2c367f45" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PrepaidExpenseCurrentAndNoncurrent_cd2f688e-9ad1-4852-a004-0e9f1682735c" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_PrepaidExpenseCurrentAndNoncurrent"/>
    <link:calculationArc order="4" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_RealEstateInvestmentPropertyNet_533adf4b-e28d-4397-86a2-1b77895fe873" xlink:to="loc_us-gaap_PrepaidExpenseCurrentAndNoncurrent_cd2f688e-9ad1-4852-a004-0e9f1682735c" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockholdersEquity_7057fa70-508f-4c3a-97bb-00f66f0d98bd" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_StockholdersEquity"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax_58e11e55-3ee0-432e-82a0-dfd185f58fde" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_StockholdersEquity_7057fa70-508f-4c3a-97bb-00f66f0d98bd" xlink:to="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax_58e11e55-3ee0-432e-82a0-dfd185f58fde" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_bdn_DeferredCompensationPayableInCommonStock_ee00eeb6-ed9e-475b-8224-e2a27dbc3ed3" xlink:href="bdn-20230630.xsd#bdn_DeferredCompensationPayableInCommonStock"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_StockholdersEquity_7057fa70-508f-4c3a-97bb-00f66f0d98bd" xlink:to="loc_bdn_DeferredCompensationPayableInCommonStock_ee00eeb6-ed9e-475b-8224-e2a27dbc3ed3" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonStockValue_aa1f28dd-c57d-4ade-89af-61337f2afc1f" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_CommonStockValue"/>
    <link:calculationArc order="3" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_StockholdersEquity_7057fa70-508f-4c3a-97bb-00f66f0d98bd" xlink:to="loc_us-gaap_CommonStockValue_aa1f28dd-c57d-4ade-89af-61337f2afc1f" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonStockHeldInTrust_0627a6db-d550-4de6-b662-b38e59a6e78c" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_CommonStockHeldInTrust"/>
    <link:calculationArc order="4" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_StockholdersEquity_7057fa70-508f-4c3a-97bb-00f66f0d98bd" xlink:to="loc_us-gaap_CommonStockHeldInTrust_0627a6db-d550-4de6-b662-b38e59a6e78c" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CumulativeDividends_fdb527c9-4fe4-41d7-8503-8d067c5a99b1" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_CumulativeDividends"/>
    <link:calculationArc order="5" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_StockholdersEquity_7057fa70-508f-4c3a-97bb-00f66f0d98bd" xlink:to="loc_us-gaap_CumulativeDividends_fdb527c9-4fe4-41d7-8503-8d067c5a99b1" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CumulativeEarningsDeficit_d6d9b6fe-337a-4aa3-94d3-aa2efd2f0ebe" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_CumulativeEarningsDeficit"/>
    <link:calculationArc order="6" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_StockholdersEquity_7057fa70-508f-4c3a-97bb-00f66f0d98bd" xlink:to="loc_us-gaap_CumulativeEarningsDeficit_d6d9b6fe-337a-4aa3-94d3-aa2efd2f0ebe" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AdditionalPaidInCapital_fc05e695-8f20-4d24-818b-213d97e4e748" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_AdditionalPaidInCapital"/>
    <link:calculationArc order="7" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_StockholdersEquity_7057fa70-508f-4c3a-97bb-00f66f0d98bd" xlink:to="loc_us-gaap_AdditionalPaidInCapital_fc05e695-8f20-4d24-818b-213d97e4e748" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest_990ddd3a-b440-4e10-8c50-a3358584ff59" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_MinorityInterest_a1ad1bee-c660-41d0-afc0-7f69b23076c8" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_MinorityInterest"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest_990ddd3a-b440-4e10-8c50-a3358584ff59" xlink:to="loc_us-gaap_MinorityInterest_a1ad1bee-c660-41d0-afc0-7f69b23076c8" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockholdersEquity_8b63d42f-0673-486c-b4ce-f37dd82ccc77" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_StockholdersEquity"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest_990ddd3a-b440-4e10-8c50-a3358584ff59" xlink:to="loc_us-gaap_StockholdersEquity_8b63d42f-0673-486c-b4ce-f37dd82ccc77" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_Assets_0eb0ddd1-409c-4004-84cb-c59199954a33" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_Assets"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RealEstateInvestmentPropertyNet_0b9b2f51-ac0a-4233-b8e7-d49fe9bc1e1b" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_RealEstateInvestmentPropertyNet"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_Assets_0eb0ddd1-409c-4004-84cb-c59199954a33" xlink:to="loc_us-gaap_RealEstateInvestmentPropertyNet_0b9b2f51-ac0a-4233-b8e7-d49fe9bc1e1b" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_bdn_EquityMethodInvestmentsInAssetPosition_eed3d6ce-fc72-4c11-b4fc-f1cfba7d4c73" xlink:href="bdn-20230630.xsd#bdn_EquityMethodInvestmentsInAssetPosition"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_Assets_0eb0ddd1-409c-4004-84cb-c59199954a33" xlink:to="loc_bdn_EquityMethodInvestmentsInAssetPosition_eed3d6ce-fc72-4c11-b4fc-f1cfba7d4c73" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_bdn_FiniteLivedIntangibleAssetsNetContinuingOperations_96841966-53c7-4e8a-b93f-61a11ed97bab" xlink:href="bdn-20230630.xsd#bdn_FiniteLivedIntangibleAssetsNetContinuingOperations"/>
    <link:calculationArc order="3" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_Assets_0eb0ddd1-409c-4004-84cb-c59199954a33" xlink:to="loc_bdn_FiniteLivedIntangibleAssetsNetContinuingOperations_96841966-53c7-4e8a-b93f-61a11ed97bab" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherAssets_3fc7c4cd-c971-4fe3-8999-0f2420512475" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_OtherAssets"/>
    <link:calculationArc order="4" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_Assets_0eb0ddd1-409c-4004-84cb-c59199954a33" xlink:to="loc_us-gaap_OtherAssets_3fc7c4cd-c971-4fe3-8999-0f2420512475" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AssetsOfDisposalGroupIncludingDiscontinuedOperation_deb66ab1-ea71-432f-b28a-93663758e631" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_AssetsOfDisposalGroupIncludingDiscontinuedOperation"/>
    <link:calculationArc order="5" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_Assets_0eb0ddd1-409c-4004-84cb-c59199954a33" xlink:to="loc_us-gaap_AssetsOfDisposalGroupIncludingDiscontinuedOperation_deb66ab1-ea71-432f-b28a-93663758e631" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccountsReceivableNet_5bae479d-6a8a-459a-90d3-3568b2e55dcb" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_AccountsReceivableNet"/>
    <link:calculationArc order="6" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_Assets_0eb0ddd1-409c-4004-84cb-c59199954a33" xlink:to="loc_us-gaap_AccountsReceivableNet_5bae479d-6a8a-459a-90d3-3568b2e55dcb" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredCostsCurrentAndNoncurrent_5f0d2814-c98f-4224-9b41-e6025524f922" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DeferredCostsCurrentAndNoncurrent"/>
    <link:calculationArc order="7" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_Assets_0eb0ddd1-409c-4004-84cb-c59199954a33" xlink:to="loc_us-gaap_DeferredCostsCurrentAndNoncurrent_5f0d2814-c98f-4224-9b41-e6025524f922" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestrictedCash_9ffa4013-fb85-4fb6-9c34-4c12f1f1978a" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_RestrictedCash"/>
    <link:calculationArc order="8" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_Assets_0eb0ddd1-409c-4004-84cb-c59199954a33" xlink:to="loc_us-gaap_RestrictedCash_9ffa4013-fb85-4fb6-9c34-4c12f1f1978a" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CashAndCashEquivalentsAtCarryingValue_2c892928-4954-4491-9dbc-bf9cf764fd05" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_CashAndCashEquivalentsAtCarryingValue"/>
    <link:calculationArc order="9" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_Assets_0eb0ddd1-409c-4004-84cb-c59199954a33" xlink:to="loc_us-gaap_CashAndCashEquivalentsAtCarryingValue_2c892928-4954-4491-9dbc-bf9cf764fd05" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredRentReceivablesNet_0bfe57dc-0db0-4ba2-8706-6207252677c9" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DeferredRentReceivablesNet"/>
    <link:calculationArc order="10" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_Assets_0eb0ddd1-409c-4004-84cb-c59199954a33" xlink:to="loc_us-gaap_DeferredRentReceivablesNet_0bfe57dc-0db0-4ba2-8706-6207252677c9" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_bdn_OperatingRealEstateInvestmentPropertyNet_f9819243-bee6-4707-aa53-2330f4ab940a" xlink:href="bdn-20230630.xsd#bdn_OperatingRealEstateInvestmentPropertyNet"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingLeaseRightOfUseAsset_19028cba-61fa-4b31-afb1-fecb0653c472" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_OperatingLeaseRightOfUseAsset"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_bdn_OperatingRealEstateInvestmentPropertyNet_f9819243-bee6-4707-aa53-2330f4ab940a" xlink:to="loc_us-gaap_OperatingLeaseRightOfUseAsset_19028cba-61fa-4b31-afb1-fecb0653c472" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RealEstateInvestmentPropertyAccumulatedDepreciation_d82b7611-d496-4eb1-bcb0-fd7afd1c2b28" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_RealEstateInvestmentPropertyAccumulatedDepreciation"/>
    <link:calculationArc order="2" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_bdn_OperatingRealEstateInvestmentPropertyNet_f9819243-bee6-4707-aa53-2330f4ab940a" xlink:to="loc_us-gaap_RealEstateInvestmentPropertyAccumulatedDepreciation_d82b7611-d496-4eb1-bcb0-fd7afd1c2b28" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RealEstateInvestmentPropertyAtCost_819e8c35-39ba-423a-8e34-94b129d167c3" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_RealEstateInvestmentPropertyAtCost"/>
    <link:calculationArc order="3" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_bdn_OperatingRealEstateInvestmentPropertyNet_f9819243-bee6-4707-aa53-2330f4ab940a" xlink:to="loc_us-gaap_RealEstateInvestmentPropertyAtCost_819e8c35-39ba-423a-8e34-94b129d167c3" xlink:type="arc"/>
  </link:calculationLink>
  <link:roleRef roleURI="http://www.brandywinerealty.com/role/CONSOLIDATEDSTATEMENTSOFOPERATIONS" xlink:type="simple" xlink:href="bdn-20230630.xsd#CONSOLIDATEDSTATEMENTSOFOPERATIONS"/>
  <link:calculationLink xlink:role="http://www.brandywinerealty.com/role/CONSOLIDATEDSTATEMENTSOFOPERATIONS" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ProfitLoss_7a726c68-73c2-43cd-ab9b-97341987d96a" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ProfitLoss"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest_cfa98348-c78c-464c-8e03-cf6cd4351a9a" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.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_ProfitLoss_7a726c68-73c2-43cd-ab9b-97341987d96a" xlink:to="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest_cfa98348-c78c-464c-8e03-cf6cd4351a9a" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeTaxExpenseBenefit_774ec5a1-16a0-42e6-974f-e608db0e2cad" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.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_ProfitLoss_7a726c68-73c2-43cd-ab9b-97341987d96a" xlink:to="loc_us-gaap_IncomeTaxExpenseBenefit_774ec5a1-16a0-42e6-974f-e608db0e2cad" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetIncomeLoss_f9e490f0-5e3c-4078-8270-d8b9bf165c00" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_NetIncomeLoss"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetIncomeLossAttributableToNoncontrollingInterest_e5aff0f2-2dab-44e4-a415-fe70aa47f011" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_NetIncomeLossAttributableToNoncontrollingInterest"/>
    <link:calculationArc order="1" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetIncomeLoss_f9e490f0-5e3c-4078-8270-d8b9bf165c00" xlink:to="loc_us-gaap_NetIncomeLossAttributableToNoncontrollingInterest_e5aff0f2-2dab-44e4-a415-fe70aa47f011" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ProfitLoss_0259f7a4-054b-481e-a43e-f99ed0935be4" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ProfitLoss"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetIncomeLoss_f9e490f0-5e3c-4078-8270-d8b9bf165c00" xlink:to="loc_us-gaap_ProfitLoss_0259f7a4-054b-481e-a43e-f99ed0935be4" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest_ef4e2e3f-46fe-4683-8eb8-695e13164ca1" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InterestExpenseOther_4685f4be-aed3-4dd1-b15a-fecfb67e5f70" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_InterestExpenseOther"/>
    <link:calculationArc order="1" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest_ef4e2e3f-46fe-4683-8eb8-695e13164ca1" xlink:to="loc_us-gaap_InterestExpenseOther_4685f4be-aed3-4dd1-b15a-fecfb67e5f70" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingIncomeLoss_53109200-f522-48ed-a84a-770f1451cc94" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_OperatingIncomeLoss"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest_ef4e2e3f-46fe-4683-8eb8-695e13164ca1" xlink:to="loc_us-gaap_OperatingIncomeLoss_53109200-f522-48ed-a84a-770f1451cc94" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeLossFromEquityMethodInvestments_753000d8-b53d-440a-bc8b-dd7db432c295" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_IncomeLossFromEquityMethodInvestments"/>
    <link:calculationArc order="3" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest_ef4e2e3f-46fe-4683-8eb8-695e13164ca1" xlink:to="loc_us-gaap_IncomeLossFromEquityMethodInvestments_753000d8-b53d-440a-bc8b-dd7db432c295" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AmortizationOfFinancingCosts_ad8aee93-e254-41b8-9e23-b2ba0dc54259" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_AmortizationOfFinancingCosts"/>
    <link:calculationArc order="4" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest_ef4e2e3f-46fe-4683-8eb8-695e13164ca1" xlink:to="loc_us-gaap_AmortizationOfFinancingCosts_ad8aee93-e254-41b8-9e23-b2ba0dc54259" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_bdn_NetGainLossOnRealEstateVentureTransactionsIncludingRealEstateVentureFormation_ae1169a1-1e9b-4bf0-b8d6-2a3062890b8e" xlink:href="bdn-20230630.xsd#bdn_NetGainLossOnRealEstateVentureTransactionsIncludingRealEstateVentureFormation"/>
    <link:calculationArc order="5" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest_ef4e2e3f-46fe-4683-8eb8-695e13164ca1" xlink:to="loc_bdn_NetGainLossOnRealEstateVentureTransactionsIncludingRealEstateVentureFormation_ae1169a1-1e9b-4bf0-b8d6-2a3062890b8e" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InvestmentIncomeNet_b2159177-dfba-4f32-bf33-06059a769169" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_InvestmentIncomeNet"/>
    <link:calculationArc order="6" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest_ef4e2e3f-46fe-4683-8eb8-695e13164ca1" xlink:to="loc_us-gaap_InvestmentIncomeNet_b2159177-dfba-4f32-bf33-06059a769169" xlink:type="arc"/>
  </link:calculationLink>
  <link:roleRef roleURI="http://www.brandywinerealty.com/role/CONSOLIDATEDSTATEMENTSOFCASHFLOWS" xlink:type="simple" xlink:href="bdn-20230630.xsd#CONSOLIDATEDSTATEMENTSOFCASHFLOWS"/>
  <link:calculationLink xlink:role="http://www.brandywinerealty.com/role/CONSOLIDATEDSTATEMENTSOFCASHFLOWS" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetCashProvidedByUsedInFinancingActivities_b3890578-f924-4c32-9db1-aeaf604db958" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_NetCashProvidedByUsedInFinancingActivities"/>
    <link:loc xlink:type="locator" xlink:label="loc_bdn_RepurchaseOfRedeemableUnits_3499a372-84a1-4a42-8572-12a59269b613" xlink:href="bdn-20230630.xsd#bdn_RepurchaseOfRedeemableUnits"/>
    <link:calculationArc order="1" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivities_b3890578-f924-4c32-9db1-aeaf604db958" xlink:to="loc_bdn_RepurchaseOfRedeemableUnits_3499a372-84a1-4a42-8572-12a59269b613" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ProceedsFromUnsecuredNotesPayable_1a21b9d5-6677-4138-810c-6e96d7be44c3" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ProceedsFromUnsecuredNotesPayable"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivities_b3890578-f924-4c32-9db1-aeaf604db958" xlink:to="loc_us-gaap_ProceedsFromUnsecuredNotesPayable_1a21b9d5-6677-4138-810c-6e96d7be44c3" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RepaymentsOfUnsecuredDebt_93602997-77d0-474d-98dc-bfc75ce12cff" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_RepaymentsOfUnsecuredDebt"/>
    <link:calculationArc order="3" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivities_b3890578-f924-4c32-9db1-aeaf604db958" xlink:to="loc_us-gaap_RepaymentsOfUnsecuredDebt_93602997-77d0-474d-98dc-bfc75ce12cff" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_bdn_PaymentsOnAccountOfEmployeeTaxWithholdingsOnShareBasedAwards_fb9bef17-16cb-412e-8f8b-2e1c869f91be" xlink:href="bdn-20230630.xsd#bdn_PaymentsOnAccountOfEmployeeTaxWithholdingsOnShareBasedAwards"/>
    <link:calculationArc order="4" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivities_b3890578-f924-4c32-9db1-aeaf604db958" xlink:to="loc_bdn_PaymentsOnAccountOfEmployeeTaxWithholdingsOnShareBasedAwards_fb9bef17-16cb-412e-8f8b-2e1c869f91be" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RepaymentsOfLongTermLinesOfCredit_babe29b0-8054-4237-a0ac-4e393544ac68" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_RepaymentsOfLongTermLinesOfCredit"/>
    <link:calculationArc order="5" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivities_b3890578-f924-4c32-9db1-aeaf604db958" xlink:to="loc_us-gaap_RepaymentsOfLongTermLinesOfCredit_babe29b0-8054-4237-a0ac-4e393544ac68" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ProceedsFromSecuredNotesPayable_5814437a-27d8-4079-9940-8c4b5b451859" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ProceedsFromSecuredNotesPayable"/>
    <link:calculationArc order="6" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivities_b3890578-f924-4c32-9db1-aeaf604db958" xlink:to="loc_us-gaap_ProceedsFromSecuredNotesPayable_5814437a-27d8-4079-9940-8c4b5b451859" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ProceedsFromLongTermLinesOfCredit_a843f93b-5efc-4eab-853d-92c84a5c9f9c" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ProceedsFromLongTermLinesOfCredit"/>
    <link:calculationArc order="7" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivities_b3890578-f924-4c32-9db1-aeaf604db958" xlink:to="loc_us-gaap_ProceedsFromLongTermLinesOfCredit_a843f93b-5efc-4eab-853d-92c84a5c9f9c" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_bdn_PaymentOfOrdinaryDividendsCommonStockAndPreferredStock_09caf4a4-66d2-4669-8268-11330ca2a6c3" xlink:href="bdn-20230630.xsd#bdn_PaymentOfOrdinaryDividendsCommonStockAndPreferredStock"/>
    <link:calculationArc order="8" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivities_b3890578-f924-4c32-9db1-aeaf604db958" xlink:to="loc_bdn_PaymentOfOrdinaryDividendsCommonStockAndPreferredStock_09caf4a4-66d2-4669-8268-11330ca2a6c3" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PaymentsOfDividendsMinorityInterest_9f80a6c2-a2be-4c05-93fc-04fd5218407c" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_PaymentsOfDividendsMinorityInterest"/>
    <link:calculationArc order="9" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivities_b3890578-f924-4c32-9db1-aeaf604db958" xlink:to="loc_us-gaap_PaymentsOfDividendsMinorityInterest_9f80a6c2-a2be-4c05-93fc-04fd5218407c" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PaymentsOfFinancingCosts_0bf6ceb3-42bd-4998-8e4e-900e25c0504c" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_PaymentsOfFinancingCosts"/>
    <link:calculationArc order="10" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivities_b3890578-f924-4c32-9db1-aeaf604db958" xlink:to="loc_us-gaap_PaymentsOfFinancingCosts_0bf6ceb3-42bd-4998-8e4e-900e25c0504c" xlink:type="arc"/>
  </link:calculationLink>
  <link:roleRef roleURI="http://www.brandywinerealty.com/role/CONSOLIDATEDBALANCESHEETSBRANDYWINEOPERATINGPARTNERSHIPLP" xlink:type="simple" xlink:href="bdn-20230630.xsd#CONSOLIDATEDBALANCESHEETSBRANDYWINEOPERATINGPARTNERSHIPLP"/>
  <link:calculationLink xlink:role="http://www.brandywinerealty.com/role/CONSOLIDATEDBALANCESHEETSBRANDYWINEOPERATINGPARTNERSHIPLP" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_Liabilities_26625b35-0eff-43bb-be3c-52a941072695" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_Liabilities"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SeniorNotes_c596850e-73cc-4b8b-be6c-c9a670d22dbc" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_SeniorNotes"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_Liabilities_26625b35-0eff-43bb-be3c-52a941072695" xlink:to="loc_us-gaap_SeniorNotes_c596850e-73cc-4b8b-be6c-c9a670d22dbc" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ContractWithCustomerLiability_a83f3b85-5614-4715-9b8a-7c3ab68e29df" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ContractWithCustomerLiability"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_Liabilities_26625b35-0eff-43bb-be3c-52a941072695" xlink:to="loc_us-gaap_ContractWithCustomerLiability_a83f3b85-5614-4715-9b8a-7c3ab68e29df" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SecuredDebt_26ea392a-f8b5-4202-8f87-d41dd9452278" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_SecuredDebt"/>
    <link:calculationArc order="3" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_Liabilities_26625b35-0eff-43bb-be3c-52a941072695" xlink:to="loc_us-gaap_SecuredDebt_26ea392a-f8b5-4202-8f87-d41dd9452278" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_bdn_BelowMarketLeaseNetOperatingActivities_02318fd8-ca07-427d-9bf2-91c16b8540a9" xlink:href="bdn-20230630.xsd#bdn_BelowMarketLeaseNetOperatingActivities"/>
    <link:calculationArc order="4" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_Liabilities_26625b35-0eff-43bb-be3c-52a941072695" xlink:to="loc_bdn_BelowMarketLeaseNetOperatingActivities_02318fd8-ca07-427d-9bf2-91c16b8540a9" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LiabilitiesOfDisposalGroupIncludingDiscontinuedOperation_f5fa9a08-ce89-4692-b127-526a88bde287" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_LiabilitiesOfDisposalGroupIncludingDiscontinuedOperation"/>
    <link:calculationArc order="5" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_Liabilities_26625b35-0eff-43bb-be3c-52a941072695" xlink:to="loc_us-gaap_LiabilitiesOfDisposalGroupIncludingDiscontinuedOperation_f5fa9a08-ce89-4692-b127-526a88bde287" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_UnsecuredDebt_92ba54f1-00e9-4b9f-aa4b-f07dbe5fab0e" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_UnsecuredDebt"/>
    <link:calculationArc order="6" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_Liabilities_26625b35-0eff-43bb-be3c-52a941072695" xlink:to="loc_us-gaap_UnsecuredDebt_92ba54f1-00e9-4b9f-aa4b-f07dbe5fab0e" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LineOfCredit_d7a5a5db-1999-48e0-a81e-798435870891" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_LineOfCredit"/>
    <link:calculationArc order="7" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_Liabilities_26625b35-0eff-43bb-be3c-52a941072695" xlink:to="loc_us-gaap_LineOfCredit_d7a5a5db-1999-48e0-a81e-798435870891" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherLiabilities_606c53e8-38d0-4b95-b583-58790681793b" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_OtherLiabilities"/>
    <link:calculationArc order="8" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_Liabilities_26625b35-0eff-43bb-be3c-52a941072695" xlink:to="loc_us-gaap_OtherLiabilities_606c53e8-38d0-4b95-b583-58790681793b" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DividendsPayableCurrentAndNoncurrent_1e515575-aef8-4753-8a83-8cbfa8a00e1c" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DividendsPayableCurrentAndNoncurrent"/>
    <link:calculationArc order="9" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_Liabilities_26625b35-0eff-43bb-be3c-52a941072695" xlink:to="loc_us-gaap_DividendsPayableCurrentAndNoncurrent_1e515575-aef8-4753-8a83-8cbfa8a00e1c" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingLeaseLiability_2acd6a7f-688a-4fcb-9b4f-fb85b2e19377" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_OperatingLeaseLiability"/>
    <link:calculationArc order="10" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_Liabilities_26625b35-0eff-43bb-be3c-52a941072695" xlink:to="loc_us-gaap_OperatingLeaseLiability_2acd6a7f-688a-4fcb-9b4f-fb85b2e19377" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccountsPayableAndAccruedLiabilitiesCurrentAndNoncurrent_a0cd3902-588d-466c-b3dc-e0728da107e6" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_AccountsPayableAndAccruedLiabilitiesCurrentAndNoncurrent"/>
    <link:calculationArc order="11" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_Liabilities_26625b35-0eff-43bb-be3c-52a941072695" xlink:to="loc_us-gaap_AccountsPayableAndAccruedLiabilitiesCurrentAndNoncurrent_a0cd3902-588d-466c-b3dc-e0728da107e6" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PartnersCapital_152f6494-8935-48db-953e-937cab75bf2a" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_PartnersCapital"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_GeneralPartnersCapitalAccount_5fec4478-1e70-4223-9f59-adec4598148e" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_GeneralPartnersCapitalAccount"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_PartnersCapital_152f6494-8935-48db-953e-937cab75bf2a" xlink:to="loc_us-gaap_GeneralPartnersCapitalAccount_5fec4478-1e70-4223-9f59-adec4598148e" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax_d4a53445-3719-4ac2-8657-f538fac5b9e1" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_PartnersCapital_152f6494-8935-48db-953e-937cab75bf2a" xlink:to="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax_d4a53445-3719-4ac2-8657-f538fac5b9e1" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LiabilitiesAndStockholdersEquity_c5cea872-3f51-440b-a93a-6cf659c605ab" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_LiabilitiesAndStockholdersEquity"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TemporaryEquityCarryingAmountIncludingPortionAttributableToNoncontrollingInterests_96fa58bc-babd-413d-b496-0237fee8c406" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_TemporaryEquityCarryingAmountIncludingPortionAttributableToNoncontrollingInterests"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_LiabilitiesAndStockholdersEquity_c5cea872-3f51-440b-a93a-6cf659c605ab" xlink:to="loc_us-gaap_TemporaryEquityCarryingAmountIncludingPortionAttributableToNoncontrollingInterests_96fa58bc-babd-413d-b496-0237fee8c406" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_Liabilities_c0779639-938f-440d-8c40-7929e0ec5e64" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_Liabilities"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_LiabilitiesAndStockholdersEquity_c5cea872-3f51-440b-a93a-6cf659c605ab" xlink:to="loc_us-gaap_Liabilities_c0779639-938f-440d-8c40-7929e0ec5e64" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PartnersCapitalIncludingPortionAttributableToNoncontrollingInterest_d21888c9-fcc1-45bb-862f-dc2680dc6010" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_PartnersCapitalIncludingPortionAttributableToNoncontrollingInterest"/>
    <link:calculationArc order="3" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_LiabilitiesAndStockholdersEquity_c5cea872-3f51-440b-a93a-6cf659c605ab" xlink:to="loc_us-gaap_PartnersCapitalIncludingPortionAttributableToNoncontrollingInterest_d21888c9-fcc1-45bb-862f-dc2680dc6010" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommitmentsAndContingencies_9a851be5-48f1-474d-9166-ea6af1b8d29a" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_CommitmentsAndContingencies"/>
    <link:calculationArc order="4" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_LiabilitiesAndStockholdersEquity_c5cea872-3f51-440b-a93a-6cf659c605ab" xlink:to="loc_us-gaap_CommitmentsAndContingencies_9a851be5-48f1-474d-9166-ea6af1b8d29a" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PartnersCapitalIncludingPortionAttributableToNoncontrollingInterest_2e795a96-0125-4448-8303-1fa44130c8aa" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_PartnersCapitalIncludingPortionAttributableToNoncontrollingInterest"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PartnersCapital_73c0277b-2ce8-4889-af5f-ac4e463a9e2d" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_PartnersCapital"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_PartnersCapitalIncludingPortionAttributableToNoncontrollingInterest_2e795a96-0125-4448-8303-1fa44130c8aa" xlink:to="loc_us-gaap_PartnersCapital_73c0277b-2ce8-4889-af5f-ac4e463a9e2d" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PartnersCapitalAttributableToNoncontrollingInterest_1756db68-99c9-462c-9714-7d3e96cf9fef" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_PartnersCapitalAttributableToNoncontrollingInterest"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_PartnersCapitalIncludingPortionAttributableToNoncontrollingInterest_2e795a96-0125-4448-8303-1fa44130c8aa" xlink:to="loc_us-gaap_PartnersCapitalAttributableToNoncontrollingInterest_1756db68-99c9-462c-9714-7d3e96cf9fef" xlink:type="arc"/>
  </link:calculationLink>
  <link:roleRef roleURI="http://www.brandywinerealty.com/role/CONSOLIDATEDSTATEMENTSOFOPERATIONSBRANDYWINEOPERATINGPARTNERSHIPLP" xlink:type="simple" xlink:href="bdn-20230630.xsd#CONSOLIDATEDSTATEMENTSOFOPERATIONSBRANDYWINEOPERATINGPARTNERSHIPLP"/>
  <link:calculationLink xlink:role="http://www.brandywinerealty.com/role/CONSOLIDATEDSTATEMENTSOFOPERATIONSBRANDYWINEOPERATINGPARTNERSHIPLP" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingIncomeLoss_26598874-9f14-4152-8cf8-c772cca9014e" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_OperatingIncomeLoss"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_Revenues_a3eff50c-b3a8-41ba-a252-aaba613739cb" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_Revenues"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_OperatingIncomeLoss_26598874-9f14-4152-8cf8-c772cca9014e" xlink:to="loc_us-gaap_Revenues_a3eff50c-b3a8-41ba-a252-aaba613739cb" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CostsAndExpenses_0eecf29d-defc-497b-8ced-81e0c5ec3b88" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_CostsAndExpenses"/>
    <link:calculationArc order="2" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_OperatingIncomeLoss_26598874-9f14-4152-8cf8-c772cca9014e" xlink:to="loc_us-gaap_CostsAndExpenses_0eecf29d-defc-497b-8ced-81e0c5ec3b88" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_GainLossOnSaleOfProperties_aa36ed9a-fbdb-4264-9a7c-ca52886bdfe3" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_GainLossOnSaleOfProperties"/>
    <link:calculationArc order="3" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_OperatingIncomeLoss_26598874-9f14-4152-8cf8-c772cca9014e" xlink:to="loc_us-gaap_GainLossOnSaleOfProperties_aa36ed9a-fbdb-4264-9a7c-ca52886bdfe3" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_GainLossOnSaleOfProperties_677ff14f-7af0-4468-8f88-b5944efff624" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_GainLossOnSaleOfProperties"/>
    <link:loc xlink:type="locator" xlink:label="loc_bdn_NetGainLossOnSaleOfUndepreciatedRealEstate_218bccbc-b688-42d3-a9f2-2a4ff6519d24" xlink:href="bdn-20230630.xsd#bdn_NetGainLossOnSaleOfUndepreciatedRealEstate"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_GainLossOnSaleOfProperties_677ff14f-7af0-4468-8f88-b5944efff624" xlink:to="loc_bdn_NetGainLossOnSaleOfUndepreciatedRealEstate_218bccbc-b688-42d3-a9f2-2a4ff6519d24" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DisposalGroupNotDiscontinuedOperationGainLossOnDisposal_ac060195-4c54-447e-b3ee-75c6949004e9" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DisposalGroupNotDiscontinuedOperationGainLossOnDisposal"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_GainLossOnSaleOfProperties_677ff14f-7af0-4468-8f88-b5944efff624" xlink:to="loc_us-gaap_DisposalGroupNotDiscontinuedOperationGainLossOnDisposal_ac060195-4c54-447e-b3ee-75c6949004e9" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetIncomeLossAllocatedToLimitedPartners_d8f84d23-4a3f-48bd-867b-469e77b7c7a9" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_NetIncomeLossAllocatedToLimitedPartners"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ProfitLoss_8fb3b1e5-e091-420c-8715-602e13031717" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ProfitLoss"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetIncomeLossAllocatedToLimitedPartners_d8f84d23-4a3f-48bd-867b-469e77b7c7a9" xlink:to="loc_us-gaap_ProfitLoss_8fb3b1e5-e091-420c-8715-602e13031717" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeLossFromContinuingOperationsAttributableToNoncontrollingEntity_face4589-b323-4f6c-a098-fedcce38e513" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_IncomeLossFromContinuingOperationsAttributableToNoncontrollingEntity"/>
    <link:calculationArc order="2" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetIncomeLossAllocatedToLimitedPartners_d8f84d23-4a3f-48bd-867b-469e77b7c7a9" xlink:to="loc_us-gaap_IncomeLossFromContinuingOperationsAttributableToNoncontrollingEntity_face4589-b323-4f6c-a098-fedcce38e513" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic_252be49e-3dbe-4d50-b998-53a7db058294" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_UndistributedEarningsLossAllocatedToParticipatingSecuritiesBasic_0fca0995-8875-4052-95ed-79369d62cc4e" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.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_252be49e-3dbe-4d50-b998-53a7db058294" xlink:to="loc_us-gaap_UndistributedEarningsLossAllocatedToParticipatingSecuritiesBasic_0fca0995-8875-4052-95ed-79369d62cc4e" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetIncomeLossAllocatedToLimitedPartners_21a9a536-8b3d-49d2-8296-96b34fafec03" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_NetIncomeLossAllocatedToLimitedPartners"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic_252be49e-3dbe-4d50-b998-53a7db058294" xlink:to="loc_us-gaap_NetIncomeLossAllocatedToLimitedPartners_21a9a536-8b3d-49d2-8296-96b34fafec03" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CostsAndExpenses_d4092512-b650-4083-bf4e-92a6c942d63e" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_CostsAndExpenses"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DepreciationAndAmortization_71db1cae-be04-415f-8623-39e5639cdada" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DepreciationAndAmortization"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_CostsAndExpenses_d4092512-b650-4083-bf4e-92a6c942d63e" xlink:to="loc_us-gaap_DepreciationAndAmortization_71db1cae-be04-415f-8623-39e5639cdada" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_bdn_ThirdPartyManagementExpenses_40987d5b-7fca-4035-bc72-ab64d72249c3" xlink:href="bdn-20230630.xsd#bdn_ThirdPartyManagementExpenses"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_CostsAndExpenses_d4092512-b650-4083-bf4e-92a6c942d63e" xlink:to="loc_bdn_ThirdPartyManagementExpenses_40987d5b-7fca-4035-bc72-ab64d72249c3" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RealEstateTaxExpense_0066975a-4314-4075-a81d-851bb56e2e4b" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_RealEstateTaxExpense"/>
    <link:calculationArc order="3" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_CostsAndExpenses_d4092512-b650-4083-bf4e-92a6c942d63e" xlink:to="loc_us-gaap_RealEstateTaxExpense_0066975a-4314-4075-a81d-851bb56e2e4b" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CostOfOtherPropertyOperatingExpense_d6c84ae8-2986-41dd-9d81-6d3abd4c4e1d" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_CostOfOtherPropertyOperatingExpense"/>
    <link:calculationArc order="4" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_CostsAndExpenses_d4092512-b650-4083-bf4e-92a6c942d63e" xlink:to="loc_us-gaap_CostOfOtherPropertyOperatingExpense_d6c84ae8-2986-41dd-9d81-6d3abd4c4e1d" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_GeneralAndAdministrativeExpense_4075ca0e-a699-4c9d-bf17-133e5d465103" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_GeneralAndAdministrativeExpense"/>
    <link:calculationArc order="5" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_CostsAndExpenses_d4092512-b650-4083-bf4e-92a6c942d63e" xlink:to="loc_us-gaap_GeneralAndAdministrativeExpense_4075ca0e-a699-4c9d-bf17-133e5d465103" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AssetImpairmentCharges_8a3d4e8b-0932-44a4-bca0-d5b2e714cfc6" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_AssetImpairmentCharges"/>
    <link:calculationArc order="6" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_CostsAndExpenses_d4092512-b650-4083-bf4e-92a6c942d63e" xlink:to="loc_us-gaap_AssetImpairmentCharges_8a3d4e8b-0932-44a4-bca0-d5b2e714cfc6" xlink:type="arc"/>
  </link:calculationLink>
  <link:roleRef roleURI="http://www.brandywinerealty.com/role/CONSOLIDATEDSTATEMENTSOFCOMPREHENSIVEINCOMEBRANDYWINEOPERATINGPARTNERSHIPLP" xlink:type="simple" xlink:href="bdn-20230630.xsd#CONSOLIDATEDSTATEMENTSOFCOMPREHENSIVEINCOMEBRANDYWINEOPERATINGPARTNERSHIPLP"/>
  <link:calculationLink xlink:role="http://www.brandywinerealty.com/role/CONSOLIDATEDSTATEMENTSOFCOMPREHENSIVEINCOMEBRANDYWINEOPERATINGPARTNERSHIPLP" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest_3d316fab-a0c0-4b2d-a5c8-d3b7d8cbc19b" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ProfitLoss_158a25fa-0397-4002-9f30-1e35e3b2fdf6" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ProfitLoss"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest_3d316fab-a0c0-4b2d-a5c8-d3b7d8cbc19b" xlink:to="loc_us-gaap_ProfitLoss_158a25fa-0397-4002-9f30-1e35e3b2fdf6" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossNetOfTax_1a5a1e26-bfb8-4f10-9ba0-e4f3481e9d46" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_OtherComprehensiveIncomeLossNetOfTax"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest_3d316fab-a0c0-4b2d-a5c8-d3b7d8cbc19b" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLossNetOfTax_1a5a1e26-bfb8-4f10-9ba0-e4f3481e9d46" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossNetOfTax_5aa7f917-4313-407d-8c54-2d3bf16e878a" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_OtherComprehensiveIncomeLossNetOfTax"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossDerivativeExcludedComponentIncreaseDecreaseBeforeAdjustmentsAfterTax_37ae4e2e-7fc1-4ecc-abc3-307db4e62420" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_OtherComprehensiveIncomeLossDerivativeExcludedComponentIncreaseDecreaseBeforeAdjustmentsAfterTax"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_OtherComprehensiveIncomeLossNetOfTax_5aa7f917-4313-407d-8c54-2d3bf16e878a" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLossDerivativeExcludedComponentIncreaseDecreaseBeforeAdjustmentsAfterTax_37ae4e2e-7fc1-4ecc-abc3-307db4e62420" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossDerivativeExcludedComponentIncreaseDecreaseAdjustmentsAfterTax_b07e6908-435d-4b50-b581-68b317012ccb" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_OtherComprehensiveIncomeLossDerivativeExcludedComponentIncreaseDecreaseAdjustmentsAfterTax"/>
    <link:calculationArc order="2" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_OtherComprehensiveIncomeLossNetOfTax_5aa7f917-4313-407d-8c54-2d3bf16e878a" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLossDerivativeExcludedComponentIncreaseDecreaseAdjustmentsAfterTax_b07e6908-435d-4b50-b581-68b317012ccb" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ComprehensiveIncomeNetOfTax_43224a77-2e76-4909-bb5a-788d32efcc84" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ComprehensiveIncomeNetOfTax"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest_ce4b7dd7-4529-42a5-825e-fc8b95ed4686" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_ComprehensiveIncomeNetOfTax_43224a77-2e76-4909-bb5a-788d32efcc84" xlink:to="loc_us-gaap_ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest_ce4b7dd7-4529-42a5-825e-fc8b95ed4686" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest_07436b5f-9a9e-433a-8a6a-1e01d85919bb" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest"/>
    <link:calculationArc order="2" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_ComprehensiveIncomeNetOfTax_43224a77-2e76-4909-bb5a-788d32efcc84" xlink:to="loc_us-gaap_ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest_07436b5f-9a9e-433a-8a6a-1e01d85919bb" xlink:type="arc"/>
  </link:calculationLink>
  <link:roleRef roleURI="http://www.brandywinerealty.com/role/CONSOLIDATEDSTATEMENTSOFCASHFLOWSBRANDYWINEOPERATINGPARTNERSHIPLP" xlink:type="simple" xlink:href="bdn-20230630.xsd#CONSOLIDATEDSTATEMENTSOFCASHFLOWSBRANDYWINEOPERATINGPARTNERSHIPLP"/>
  <link:calculationLink xlink:role="http://www.brandywinerealty.com/role/CONSOLIDATEDSTATEMENTSOFCASHFLOWSBRANDYWINEOPERATINGPARTNERSHIPLP" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetCashProvidedByUsedInInvestingActivities_7d838ddc-3e33-47ad-a55c-fcede6249c36" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_NetCashProvidedByUsedInInvestingActivities"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PaymentsForTenantImprovements_50a26a38-67cb-4259-991e-3f112bb83ef7" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_PaymentsForTenantImprovements"/>
    <link:calculationArc order="1" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInInvestingActivities_7d838ddc-3e33-47ad-a55c-fcede6249c36" xlink:to="loc_us-gaap_PaymentsForTenantImprovements_50a26a38-67cb-4259-991e-3f112bb83ef7" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ProceedsFromEquityMethodInvestmentDividendsOrDistributionsReturnOfCapital_e916f9e3-c5ec-4067-a255-7bfa0146d253" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ProceedsFromEquityMethodInvestmentDividendsOrDistributionsReturnOfCapital"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInInvestingActivities_7d838ddc-3e33-47ad-a55c-fcede6249c36" xlink:to="loc_us-gaap_ProceedsFromEquityMethodInvestmentDividendsOrDistributionsReturnOfCapital_e916f9e3-c5ec-4067-a255-7bfa0146d253" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PaymentsToDevelopRealEstateAssets_ecb5416d-4768-4753-a332-1b589132254b" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_PaymentsToDevelopRealEstateAssets"/>
    <link:calculationArc order="3" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInInvestingActivities_7d838ddc-3e33-47ad-a55c-fcede6249c36" xlink:to="loc_us-gaap_PaymentsToDevelopRealEstateAssets_ecb5416d-4768-4753-a332-1b589132254b" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ProceedsFromSaleOfPropertyPlantAndEquipment_ca8170ee-e59e-47c5-a42d-d6a9bcf469c5" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ProceedsFromSaleOfPropertyPlantAndEquipment"/>
    <link:calculationArc order="4" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInInvestingActivities_7d838ddc-3e33-47ad-a55c-fcede6249c36" xlink:to="loc_us-gaap_ProceedsFromSaleOfPropertyPlantAndEquipment_ca8170ee-e59e-47c5-a42d-d6a9bcf469c5" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PaymentsToAcquireEquityMethodInvestments_5b84f3a0-261d-4899-8ad7-e1ca5082d396" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_PaymentsToAcquireEquityMethodInvestments"/>
    <link:calculationArc order="5" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInInvestingActivities_7d838ddc-3e33-47ad-a55c-fcede6249c36" xlink:to="loc_us-gaap_PaymentsToAcquireEquityMethodInvestments_5b84f3a0-261d-4899-8ad7-e1ca5082d396" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_bdn_AdvancesToTenantForPurchaseOfTenantAssetsNetOfRepayments_f25f637c-af0e-4742-b523-e2c52e87f1e4" xlink:href="bdn-20230630.xsd#bdn_AdvancesToTenantForPurchaseOfTenantAssetsNetOfRepayments"/>
    <link:calculationArc order="6" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInInvestingActivities_7d838ddc-3e33-47ad-a55c-fcede6249c36" xlink:to="loc_bdn_AdvancesToTenantForPurchaseOfTenantAssetsNetOfRepayments_f25f637c-af0e-4742-b523-e2c52e87f1e4" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PaymentsForProceedsFromDepositsOnRealEstateAcquisitions_d245e1a7-bf37-4703-a24c-dd318b396891" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_PaymentsForProceedsFromDepositsOnRealEstateAcquisitions"/>
    <link:calculationArc order="7" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInInvestingActivities_7d838ddc-3e33-47ad-a55c-fcede6249c36" xlink:to="loc_us-gaap_PaymentsForProceedsFromDepositsOnRealEstateAcquisitions_d245e1a7-bf37-4703-a24c-dd318b396891" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PaymentsForLeasingCosts_5138c88f-72d4-4c81-b4f0-fe2b088c4dea" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_PaymentsForLeasingCosts"/>
    <link:calculationArc order="8" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInInvestingActivities_7d838ddc-3e33-47ad-a55c-fcede6249c36" xlink:to="loc_us-gaap_PaymentsForLeasingCosts_5138c88f-72d4-4c81-b4f0-fe2b088c4dea" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_bdn_PaymentsToRedevelopRealEstate_d7246c68-6790-43ed-809b-b9ebb5a29af8" xlink:href="bdn-20230630.xsd#bdn_PaymentsToRedevelopRealEstate"/>
    <link:calculationArc order="9" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInInvestingActivities_7d838ddc-3e33-47ad-a55c-fcede6249c36" xlink:to="loc_bdn_PaymentsToRedevelopRealEstate_d7246c68-6790-43ed-809b-b9ebb5a29af8" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PaymentsToAcquireRealEstate_7d794dfe-0b7c-4786-af26-f23c05cae941" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_PaymentsToAcquireRealEstate"/>
    <link:calculationArc order="10" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInInvestingActivities_7d838ddc-3e33-47ad-a55c-fcede6249c36" xlink:to="loc_us-gaap_PaymentsToAcquireRealEstate_7d794dfe-0b7c-4786-af26-f23c05cae941" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_7975d08c-5fb3-4768-8937-e8a99c165f00" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_NetCashProvidedByUsedInOperatingActivities"/>
    <link:loc xlink:type="locator" xlink:label="loc_bdn_IncomeLossFromRealEstateVenturesNetOfDistributions_e10b22a1-9e90-43cf-b578-3fbee936348b" xlink:href="bdn-20230630.xsd#bdn_IncomeLossFromRealEstateVenturesNetOfDistributions"/>
    <link:calculationArc order="1" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_7975d08c-5fb3-4768-8937-e8a99c165f00" xlink:to="loc_bdn_IncomeLossFromRealEstateVenturesNetOfDistributions_e10b22a1-9e90-43cf-b578-3fbee936348b" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_bdn_StraightLineGroundRentExpense_3e6e8820-59d3-42b4-b8c0-a023dc9b790d" xlink:href="bdn-20230630.xsd#bdn_StraightLineGroundRentExpense"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_7975d08c-5fb3-4768-8937-e8a99c165f00" xlink:to="loc_bdn_StraightLineGroundRentExpense_3e6e8820-59d3-42b4-b8c0-a023dc9b790d" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AssetImpairmentCharges_c3ade83b-34d6-4b1b-9f95-a1f9afe43674" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_AssetImpairmentCharges"/>
    <link:calculationArc order="3" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_7975d08c-5fb3-4768-8937-e8a99c165f00" xlink:to="loc_us-gaap_AssetImpairmentCharges_c3ade83b-34d6-4b1b-9f95-a1f9afe43674" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncreaseDecreaseInOtherOperatingAssets_6f8efd25-d351-4d23-bf15-938872b3572d" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_IncreaseDecreaseInOtherOperatingAssets"/>
    <link:calculationArc order="4" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_7975d08c-5fb3-4768-8937-e8a99c165f00" xlink:to="loc_us-gaap_IncreaseDecreaseInOtherOperatingAssets_6f8efd25-d351-4d23-bf15-938872b3572d" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_GainLossOnSaleOfProperties_5f6822bb-cff5-4c3a-886c-37eedf245c10" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_GainLossOnSaleOfProperties"/>
    <link:calculationArc order="5" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_7975d08c-5fb3-4768-8937-e8a99c165f00" xlink:to="loc_us-gaap_GainLossOnSaleOfProperties_5f6822bb-cff5-4c3a-886c-37eedf245c10" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AmortizationOfFinancingCosts_3e30916b-cb35-4184-a125-2e6301f278f2" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_AmortizationOfFinancingCosts"/>
    <link:calculationArc order="6" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_7975d08c-5fb3-4768-8937-e8a99c165f00" xlink:to="loc_us-gaap_AmortizationOfFinancingCosts_3e30916b-cb35-4184-a125-2e6301f278f2" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncreaseDecreaseInAccountsReceivable_ce479fff-0c3a-497e-b669-ad63bfdebab1" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_IncreaseDecreaseInAccountsReceivable"/>
    <link:calculationArc order="7" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_7975d08c-5fb3-4768-8937-e8a99c165f00" xlink:to="loc_us-gaap_IncreaseDecreaseInAccountsReceivable_ce479fff-0c3a-497e-b669-ad63bfdebab1" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_bdn_StraightLineRentExcludingRentTerminationFee_7806df46-46f2-4e78-87b6-0b859dcf1f95" xlink:href="bdn-20230630.xsd#bdn_StraightLineRentExcludingRentTerminationFee"/>
    <link:calculationArc order="8" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_7975d08c-5fb3-4768-8937-e8a99c165f00" xlink:to="loc_bdn_StraightLineRentExcludingRentTerminationFee_7806df46-46f2-4e78-87b6-0b859dcf1f95" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensation_ba49114e-c060-4b98-9afb-5e2e84d02cbf" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ShareBasedCompensation"/>
    <link:calculationArc order="9" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_7975d08c-5fb3-4768-8937-e8a99c165f00" xlink:to="loc_us-gaap_ShareBasedCompensation_ba49114e-c060-4b98-9afb-5e2e84d02cbf" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncreaseDecreaseInAccountsPayableAndAccruedLiabilities_400289a2-39a0-43c8-9634-cf0afddf4e8f" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_IncreaseDecreaseInAccountsPayableAndAccruedLiabilities"/>
    <link:calculationArc order="10" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_7975d08c-5fb3-4768-8937-e8a99c165f00" xlink:to="loc_us-gaap_IncreaseDecreaseInAccountsPayableAndAccruedLiabilities_400289a2-39a0-43c8-9634-cf0afddf4e8f" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AmortizationOfAboveAndBelowMarketLeases_f639aa70-9b5e-4876-8c9f-10a9344ec9d3" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_AmortizationOfAboveAndBelowMarketLeases"/>
    <link:calculationArc order="11" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_7975d08c-5fb3-4768-8937-e8a99c165f00" xlink:to="loc_us-gaap_AmortizationOfAboveAndBelowMarketLeases_f639aa70-9b5e-4876-8c9f-10a9344ec9d3" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_bdn_NetGainLossOnRealEstateVentureTransactions_6d50ed87-926b-46fa-8933-078308fe00ca" xlink:href="bdn-20230630.xsd#bdn_NetGainLossOnRealEstateVentureTransactions"/>
    <link:calculationArc order="12" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_7975d08c-5fb3-4768-8937-e8a99c165f00" xlink:to="loc_bdn_NetGainLossOnRealEstateVentureTransactions_6d50ed87-926b-46fa-8933-078308fe00ca" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AmortizationOfDebtDiscountPremium_990d78e1-6dd4-4556-8a86-4e0f16e70189" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_AmortizationOfDebtDiscountPremium"/>
    <link:calculationArc order="13" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_7975d08c-5fb3-4768-8937-e8a99c165f00" xlink:to="loc_us-gaap_AmortizationOfDebtDiscountPremium_990d78e1-6dd4-4556-8a86-4e0f16e70189" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DepreciationAndAmortization_f303a8db-6e10-471a-b596-6ea0520ecefa" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DepreciationAndAmortization"/>
    <link:calculationArc order="14" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_7975d08c-5fb3-4768-8937-e8a99c165f00" xlink:to="loc_us-gaap_DepreciationAndAmortization_f303a8db-6e10-471a-b596-6ea0520ecefa" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeTaxExpenseBenefit_38f03ece-d23d-44e1-a8ea-508a906a8d26" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_IncomeTaxExpenseBenefit"/>
    <link:calculationArc order="15" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_7975d08c-5fb3-4768-8937-e8a99c165f00" xlink:to="loc_us-gaap_IncomeTaxExpenseBenefit_38f03ece-d23d-44e1-a8ea-508a906a8d26" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncreaseDecreaseInContractWithCustomerLiability_d1aff202-0274-4f0f-8b21-36431b525d43" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_IncreaseDecreaseInContractWithCustomerLiability"/>
    <link:calculationArc order="16" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_7975d08c-5fb3-4768-8937-e8a99c165f00" xlink:to="loc_us-gaap_IncreaseDecreaseInContractWithCustomerLiability_d1aff202-0274-4f0f-8b21-36431b525d43" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ProfitLoss_9444dbf1-7af5-46b4-a303-20bfa72bc467" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ProfitLoss"/>
    <link:calculationArc order="17" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_7975d08c-5fb3-4768-8937-e8a99c165f00" xlink:to="loc_us-gaap_ProfitLoss_9444dbf1-7af5-46b4-a303-20bfa72bc467" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncreaseDecreaseInOtherOperatingLiabilities_49c82d8b-3d59-46c1-a1bc-af69a5086035" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_IncreaseDecreaseInOtherOperatingLiabilities"/>
    <link:calculationArc order="18" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_7975d08c-5fb3-4768-8937-e8a99c165f00" xlink:to="loc_us-gaap_IncreaseDecreaseInOtherOperatingLiabilities_49c82d8b-3d59-46c1-a1bc-af69a5086035" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect_2c7a70e8-14b1-41f9-a359-bb37243a80ee" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_183d8bed-1cb3-4760-a76b-f25aab4e8bfa" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.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_2c7a70e8-14b1-41f9-a359-bb37243a80ee" xlink:to="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_183d8bed-1cb3-4760-a76b-f25aab4e8bfa" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetCashProvidedByUsedInInvestingActivities_c79bf997-5bdd-402d-94f3-314deb955609" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.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_2c7a70e8-14b1-41f9-a359-bb37243a80ee" xlink:to="loc_us-gaap_NetCashProvidedByUsedInInvestingActivities_c79bf997-5bdd-402d-94f3-314deb955609" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetCashProvidedByUsedInFinancingActivities_e2d105ed-f65f-4100-abe9-eeb953bd7aec" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.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_2c7a70e8-14b1-41f9-a359-bb37243a80ee" xlink:to="loc_us-gaap_NetCashProvidedByUsedInFinancingActivities_e2d105ed-f65f-4100-abe9-eeb953bd7aec" xlink:type="arc"/>
  </link:calculationLink>
  <link:roleRef roleURI="http://www.brandywinerealty.com/role/REALESTATEINVESTMENTSScheduleofGrossCarryingValueofOperatingPropertiesDetails" xlink:type="simple" xlink:href="bdn-20230630.xsd#REALESTATEINVESTMENTSScheduleofGrossCarryingValueofOperatingPropertiesDetails"/>
  <link:calculationLink xlink:role="http://www.brandywinerealty.com/role/REALESTATEINVESTMENTSScheduleofGrossCarryingValueofOperatingPropertiesDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_bdn_RealEstateInvestmentPropertyHeldForUseAndSale_8099cfd3-8262-431b-9bde-ece8fcd1eaa0" xlink:href="bdn-20230630.xsd#bdn_RealEstateInvestmentPropertyHeldForUseAndSale"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InvestmentBuildingAndBuildingImprovements_c09921ab-6f33-4606-b6cf-0234bb682754" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_InvestmentBuildingAndBuildingImprovements"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_bdn_RealEstateInvestmentPropertyHeldForUseAndSale_8099cfd3-8262-431b-9bde-ece8fcd1eaa0" xlink:to="loc_us-gaap_InvestmentBuildingAndBuildingImprovements_c09921ab-6f33-4606-b6cf-0234bb682754" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TenantImprovements_4c0f1934-0541-4932-9307-c187b860215e" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_TenantImprovements"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_bdn_RealEstateInvestmentPropertyHeldForUseAndSale_8099cfd3-8262-431b-9bde-ece8fcd1eaa0" xlink:to="loc_us-gaap_TenantImprovements_4c0f1934-0541-4932-9307-c187b860215e" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_Land_6cc0b78b-9df1-4ba9-bded-7302cc660034" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_Land"/>
    <link:calculationArc order="3" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_bdn_RealEstateInvestmentPropertyHeldForUseAndSale_8099cfd3-8262-431b-9bde-ece8fcd1eaa0" xlink:to="loc_us-gaap_Land_6cc0b78b-9df1-4ba9-bded-7302cc660034" xlink:type="arc"/>
  </link:calculationLink>
  <link:roleRef roleURI="http://www.brandywinerealty.com/role/REALESTATEINVESTMENTSScheduleofPropertiesClassifiedasHeldforSaleDetails" xlink:type="simple" xlink:href="bdn-20230630.xsd#REALESTATEINVESTMENTSScheduleofPropertiesClassifiedasHeldforSaleDetails"/>
  <link:calculationLink xlink:role="http://www.brandywinerealty.com/role/REALESTATEINVESTMENTSScheduleofPropertiesClassifiedasHeldforSaleDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RealEstateInvestmentPropertyNet_e2b60f8a-d98e-4f51-acda-cc971fcddf58" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_RealEstateInvestmentPropertyNet"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RealEstateHeldforsale_962e750b-a563-46a7-ba83-40469c55685e" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_RealEstateHeldforsale"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_RealEstateInvestmentPropertyNet_e2b60f8a-d98e-4f51-acda-cc971fcddf58" xlink:to="loc_us-gaap_RealEstateHeldforsale_962e750b-a563-46a7-ba83-40469c55685e" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RealEstateInvestmentPropertyAccumulatedDepreciation_35988175-5f76-4d47-916a-f89fbe24be06" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_RealEstateInvestmentPropertyAccumulatedDepreciation"/>
    <link:calculationArc order="2" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_RealEstateInvestmentPropertyNet_e2b60f8a-d98e-4f51-acda-cc971fcddf58" xlink:to="loc_us-gaap_RealEstateInvestmentPropertyAccumulatedDepreciation_35988175-5f76-4d47-916a-f89fbe24be06" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_Assets_4f13dd98-d538-4162-bf5f-61cfa94e266d" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_Assets"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherAssets_62cc9ad6-54e1-4624-805f-39f3e8c0ed85" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_OtherAssets"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_Assets_4f13dd98-d538-4162-bf5f-61cfa94e266d" xlink:to="loc_us-gaap_OtherAssets_62cc9ad6-54e1-4624-805f-39f3e8c0ed85" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsNet_cdba6fa3-d525-47b6-b278-d5473609662c" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_FiniteLivedIntangibleAssetsNet"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_Assets_4f13dd98-d538-4162-bf5f-61cfa94e266d" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsNet_cdba6fa3-d525-47b6-b278-d5473609662c" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredCostsCurrentAndNoncurrent_8870a188-2850-4a04-8c22-bb3bb46f43a6" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DeferredCostsCurrentAndNoncurrent"/>
    <link:calculationArc order="3" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_Assets_4f13dd98-d538-4162-bf5f-61cfa94e266d" xlink:to="loc_us-gaap_DeferredCostsCurrentAndNoncurrent_8870a188-2850-4a04-8c22-bb3bb46f43a6" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RealEstateInvestmentPropertyNet_ff7bdff1-2f93-4427-8ebd-9bf8efdc3a15" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_RealEstateInvestmentPropertyNet"/>
    <link:calculationArc order="4" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_Assets_4f13dd98-d538-4162-bf5f-61cfa94e266d" xlink:to="loc_us-gaap_RealEstateInvestmentPropertyNet_ff7bdff1-2f93-4427-8ebd-9bf8efdc3a15" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccruedInvestmentIncomeReceivable_07dfbdd6-6c8c-42e3-ab93-60a17282f900" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_AccruedInvestmentIncomeReceivable"/>
    <link:calculationArc order="5" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_Assets_4f13dd98-d538-4162-bf5f-61cfa94e266d" xlink:to="loc_us-gaap_AccruedInvestmentIncomeReceivable_07dfbdd6-6c8c-42e3-ab93-60a17282f900" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RealEstateInvestmentPropertyAtCost_930b970a-13b9-4b33-aa96-a9e3693af575" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_RealEstateInvestmentPropertyAtCost"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RealEstateInvestmentPropertyAccumulatedDepreciation_3941cab6-702c-4adf-9a1c-aee3e1590df0" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_RealEstateInvestmentPropertyAccumulatedDepreciation"/>
    <link:calculationArc order="1" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_RealEstateInvestmentPropertyAtCost_930b970a-13b9-4b33-aa96-a9e3693af575" xlink:to="loc_us-gaap_RealEstateInvestmentPropertyAccumulatedDepreciation_3941cab6-702c-4adf-9a1c-aee3e1590df0" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RealEstateHeldforsale_11c286ad-f3ba-46bd-af65-9e2bb391c276" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_RealEstateHeldforsale"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_RealEstateInvestmentPropertyAtCost_930b970a-13b9-4b33-aa96-a9e3693af575" xlink:to="loc_us-gaap_RealEstateHeldforsale_11c286ad-f3ba-46bd-af65-9e2bb391c276" xlink:type="arc"/>
  </link:calculationLink>
  <link:roleRef roleURI="http://www.brandywinerealty.com/role/INVESTMENTINUNCONSOLIDATEDREALESTATEVENTURESSummaryofResultsofOperationsofRealEstateVentureswithInterestsDetails" xlink:type="simple" xlink:href="bdn-20230630.xsd#INVESTMENTINUNCONSOLIDATEDREALESTATEVENTURESSummaryofResultsofOperationsofRealEstateVentureswithInterestsDetails"/>
  <link:calculationLink xlink:role="http://www.brandywinerealty.com/role/INVESTMENTINUNCONSOLIDATEDREALESTATEVENTURESSummaryofResultsofOperationsofRealEstateVentureswithInterestsDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeLossFromEquityMethodInvestments_c241c53e-35ee-4649-9d53-977828cd4c36" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_IncomeLossFromEquityMethodInvestments"/>
    <link:loc xlink:type="locator" xlink:label="loc_bdn_BasisAdjustmentsAndOther_f33cd94f-12e0-4d43-a68b-74ec21b91c1f" xlink:href="bdn-20230630.xsd#bdn_BasisAdjustmentsAndOther"/>
    <link:calculationArc order="1" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_IncomeLossFromEquityMethodInvestments_c241c53e-35ee-4649-9d53-977828cd4c36" xlink:to="loc_bdn_BasisAdjustmentsAndOther_f33cd94f-12e0-4d43-a68b-74ec21b91c1f" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_bdn_IncomeLossFromEquityMethodInvestmentsBeforeBasisAdjustmentsAndOther_2d9a622d-c4d0-4ada-8023-c3632ad99931" xlink:href="bdn-20230630.xsd#bdn_IncomeLossFromEquityMethodInvestmentsBeforeBasisAdjustmentsAndOther"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_IncomeLossFromEquityMethodInvestments_c241c53e-35ee-4649-9d53-977828cd4c36" xlink:to="loc_bdn_IncomeLossFromEquityMethodInvestmentsBeforeBasisAdjustmentsAndOther_2d9a622d-c4d0-4ada-8023-c3632ad99931" xlink:type="arc"/>
  </link:calculationLink>
  <link:roleRef roleURI="http://www.brandywinerealty.com/role/LEASESDetails" xlink:type="simple" xlink:href="bdn-20230630.xsd#LEASESDetails"/>
  <link:calculationLink xlink:role="http://www.brandywinerealty.com/role/LEASESDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingLeaseLeaseIncome_ac3b0de3-1d0d-45ee-8be2-fa58a06146db" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_OperatingLeaseLeaseIncome"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingLeaseLeaseIncomeLeasePayments_ddc1331f-d051-417d-9b8d-56b2f0a6e0d6" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_OperatingLeaseLeaseIncomeLeasePayments"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_OperatingLeaseLeaseIncome_ac3b0de3-1d0d-45ee-8be2-fa58a06146db" xlink:to="loc_us-gaap_OperatingLeaseLeaseIncomeLeasePayments_ddc1331f-d051-417d-9b8d-56b2f0a6e0d6" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingLeaseVariableLeaseIncome_af36b06f-6cab-44d2-a215-f1ed59824d87" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_OperatingLeaseVariableLeaseIncome"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_OperatingLeaseLeaseIncome_ac3b0de3-1d0d-45ee-8be2-fa58a06146db" xlink:to="loc_us-gaap_OperatingLeaseVariableLeaseIncome_af36b06f-6cab-44d2-a215-f1ed59824d87" xlink:type="arc"/>
  </link:calculationLink>
  <link:roleRef roleURI="http://www.brandywinerealty.com/role/INTANGIBLEASSETSANDLIABILITIESSummaryofIntangibleAssetsandLiabilitiesDetails" xlink:type="simple" xlink:href="bdn-20230630.xsd#INTANGIBLEASSETSANDLIABILITIESSummaryofIntangibleAssetsandLiabilitiesDetails"/>
  <link:calculationLink xlink:role="http://www.brandywinerealty.com/role/INTANGIBLEASSETSANDLIABILITIESSummaryofIntangibleAssetsandLiabilitiesDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BelowMarketLeaseNet_8baeb06c-4066-440d-a32b-c337f8b9c28c" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_BelowMarketLeaseNet"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BelowMarketLeaseGross_16e8ec1b-abeb-4b64-9ba6-758754f45d84" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_BelowMarketLeaseGross"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_BelowMarketLeaseNet_8baeb06c-4066-440d-a32b-c337f8b9c28c" xlink:to="loc_us-gaap_BelowMarketLeaseGross_16e8ec1b-abeb-4b64-9ba6-758754f45d84" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BelowMarketLeaseAccumulatedAmortization_5f3a46b7-fafd-4786-ba1b-e00132621f70" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_BelowMarketLeaseAccumulatedAmortization"/>
    <link:calculationArc order="2" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_BelowMarketLeaseNet_8baeb06c-4066-440d-a32b-c337f8b9c28c" xlink:to="loc_us-gaap_BelowMarketLeaseAccumulatedAmortization_5f3a46b7-fafd-4786-ba1b-e00132621f70" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsNet_f94747ed-15b1-4590-a886-979a88f86505" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_FiniteLivedIntangibleAssetsNet"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsGross_d93e7384-124e-499e-a921-d58b77bda215" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_FiniteLivedIntangibleAssetsGross"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsNet_f94747ed-15b1-4590-a886-979a88f86505" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsGross_d93e7384-124e-499e-a921-d58b77bda215" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization_57d27861-c23d-438d-9915-a61d03a94ac8" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization"/>
    <link:calculationArc order="2" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsNet_f94747ed-15b1-4590-a886-979a88f86505" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization_57d27861-c23d-438d-9915-a61d03a94ac8" xlink:type="arc"/>
  </link:calculationLink>
  <link:roleRef roleURI="http://www.brandywinerealty.com/role/INTANGIBLEASSETSANDLIABILITIESSummaryofAnnualAmortizationofIntangibleAssetsLiabilitiesDetails" xlink:type="simple" xlink:href="bdn-20230630.xsd#INTANGIBLEASSETSANDLIABILITIESSummaryofAnnualAmortizationofIntangibleAssetsLiabilitiesDetails"/>
  <link:calculationLink xlink:role="http://www.brandywinerealty.com/role/INTANGIBLEASSETSANDLIABILITIESSummaryofAnnualAmortizationofIntangibleAssetsLiabilitiesDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BelowMarketLeaseNet_f5ca3908-97cc-41e2-a795-925b8d7ab9cf" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_BelowMarketLeaseNet"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BelowMarketLeaseAmortizationIncomeYearThree_6ed4405a-9ba5-4ac2-a792-38d0db103e97" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_BelowMarketLeaseAmortizationIncomeYearThree"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_BelowMarketLeaseNet_f5ca3908-97cc-41e2-a795-925b8d7ab9cf" xlink:to="loc_us-gaap_BelowMarketLeaseAmortizationIncomeYearThree_6ed4405a-9ba5-4ac2-a792-38d0db103e97" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BelowMarketLeaseAmortizationIncomeYearFour_8480cc2c-324d-4fa1-b49e-e3182a21acca" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_BelowMarketLeaseAmortizationIncomeYearFour"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_BelowMarketLeaseNet_f5ca3908-97cc-41e2-a795-925b8d7ab9cf" xlink:to="loc_us-gaap_BelowMarketLeaseAmortizationIncomeYearFour_8480cc2c-324d-4fa1-b49e-e3182a21acca" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BelowMarketLeaseAmortizationIncomeYearTwo_ad9fbb9d-abc6-4e1b-9345-03de0b808656" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_BelowMarketLeaseAmortizationIncomeYearTwo"/>
    <link:calculationArc order="3" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_BelowMarketLeaseNet_f5ca3908-97cc-41e2-a795-925b8d7ab9cf" xlink:to="loc_us-gaap_BelowMarketLeaseAmortizationIncomeYearTwo_ad9fbb9d-abc6-4e1b-9345-03de0b808656" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_bdn_BelowMarketLeaseAmortizationIncomeAfterYearFour_6587eaf3-08b4-4983-8fc2-07c23ec3f218" xlink:href="bdn-20230630.xsd#bdn_BelowMarketLeaseAmortizationIncomeAfterYearFour"/>
    <link:calculationArc order="4" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_BelowMarketLeaseNet_f5ca3908-97cc-41e2-a795-925b8d7ab9cf" xlink:to="loc_bdn_BelowMarketLeaseAmortizationIncomeAfterYearFour_6587eaf3-08b4-4983-8fc2-07c23ec3f218" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BelowMarketLeaseAmortizationIncomeRemainderOfFiscalYear_8db51bda-fde8-4062-814d-74a49680aab9" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_BelowMarketLeaseAmortizationIncomeRemainderOfFiscalYear"/>
    <link:calculationArc order="5" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_BelowMarketLeaseNet_f5ca3908-97cc-41e2-a795-925b8d7ab9cf" xlink:to="loc_us-gaap_BelowMarketLeaseAmortizationIncomeRemainderOfFiscalYear_8db51bda-fde8-4062-814d-74a49680aab9" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BelowMarketLeaseAmortizationIncomeNextTwelveMonths_edb2f17f-b0ae-489c-94e6-b4c77b88f9d5" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_BelowMarketLeaseAmortizationIncomeNextTwelveMonths"/>
    <link:calculationArc order="6" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_BelowMarketLeaseNet_f5ca3908-97cc-41e2-a795-925b8d7ab9cf" xlink:to="loc_us-gaap_BelowMarketLeaseAmortizationIncomeNextTwelveMonths_edb2f17f-b0ae-489c-94e6-b4c77b88f9d5" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsNet_9cadceb5-ee9c-4a75-ac15-60f0047659e1" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_FiniteLivedIntangibleAssetsNet"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFour_9c300294-84bc-4f08-b198-8f2eb16febf9" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFour"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsNet_9cadceb5-ee9c-4a75-ac15-60f0047659e1" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFour_9c300294-84bc-4f08-b198-8f2eb16febf9" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_bdn_FiniteLivedIntangibleAssetExpectedAmortizationAfterYearFour_a0096f0b-11cd-4c9d-858a-c932142c2501" xlink:href="bdn-20230630.xsd#bdn_FiniteLivedIntangibleAssetExpectedAmortizationAfterYearFour"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsNet_9cadceb5-ee9c-4a75-ac15-60f0047659e1" xlink:to="loc_bdn_FiniteLivedIntangibleAssetExpectedAmortizationAfterYearFour_a0096f0b-11cd-4c9d-858a-c932142c2501" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths_756bdd3e-a3aa-43b2-b16d-ffd510c14b04" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths"/>
    <link:calculationArc order="3" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsNet_9cadceb5-ee9c-4a75-ac15-60f0047659e1" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths_756bdd3e-a3aa-43b2-b16d-ffd510c14b04" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo_fa3316a0-86dd-4772-a866-eda30bd8aaf2" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo"/>
    <link:calculationArc order="4" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsNet_9cadceb5-ee9c-4a75-ac15-60f0047659e1" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo_fa3316a0-86dd-4772-a866-eda30bd8aaf2" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearThree_d7a6d823-baf3-4611-845f-e82b073e1c82" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearThree"/>
    <link:calculationArc order="5" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsNet_9cadceb5-ee9c-4a75-ac15-60f0047659e1" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearThree_d7a6d823-baf3-4611-845f-e82b073e1c82" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseRemainderOfFiscalYear_2677f7cf-aa5a-4abf-b30e-e2ae602e2a2c" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseRemainderOfFiscalYear"/>
    <link:calculationArc order="6" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsNet_9cadceb5-ee9c-4a75-ac15-60f0047659e1" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseRemainderOfFiscalYear_2677f7cf-aa5a-4abf-b30e-e2ae602e2a2c" xlink:type="arc"/>
  </link:calculationLink>
  <link:roleRef roleURI="http://www.brandywinerealty.com/role/DEBTOBLIGATIONSScheduledPrincipalPaymentsofDebtObligationExcludingAmortizationofDiscountsandPremiumsDetails" xlink:type="simple" xlink:href="bdn-20230630.xsd#DEBTOBLIGATIONSScheduledPrincipalPaymentsofDebtObligationExcludingAmortizationofDiscountsandPremiumsDetails"/>
  <link:calculationLink xlink:role="http://www.brandywinerealty.com/role/DEBTOBLIGATIONSScheduledPrincipalPaymentsofDebtObligationExcludingAmortizationofDiscountsandPremiumsDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentCarryingAmount_f0f3a529-b1ac-487b-bcc7-184ac47d38a3" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DebtInstrumentCarryingAmount"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearTwo_ccc677f1-1069-4069-914c-dd9d911c2f76" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearTwo"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_DebtInstrumentCarryingAmount_f0f3a529-b1ac-487b-bcc7-184ac47d38a3" xlink:to="loc_us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearTwo_ccc677f1-1069-4069-914c-dd9d911c2f76" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFour_7fc6d616-358f-4005-8ac0-beceb2a8c726" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFour"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_DebtInstrumentCarryingAmount_f0f3a529-b1ac-487b-bcc7-184ac47d38a3" xlink:to="loc_us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFour_7fc6d616-358f-4005-8ac0-beceb2a8c726" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearThree_00db66cb-3ecb-4471-ab5b-34db303a15a8" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearThree"/>
    <link:calculationArc order="3" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_DebtInstrumentCarryingAmount_f0f3a529-b1ac-487b-bcc7-184ac47d38a3" xlink:to="loc_us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearThree_00db66cb-3ecb-4471-ab5b-34db303a15a8" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalRemainderOfFiscalYear_bd6c1a2f-8a16-4dc2-b255-181fa52c2cd7" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalRemainderOfFiscalYear"/>
    <link:calculationArc order="4" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_DebtInstrumentCarryingAmount_f0f3a529-b1ac-487b-bcc7-184ac47d38a3" xlink:to="loc_us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalRemainderOfFiscalYear_bd6c1a2f-8a16-4dc2-b255-181fa52c2cd7" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInNextTwelveMonths_d8e58024-2723-4226-80a6-ad8d1d8e8385" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInNextTwelveMonths"/>
    <link:calculationArc order="5" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_DebtInstrumentCarryingAmount_f0f3a529-b1ac-487b-bcc7-184ac47d38a3" xlink:to="loc_us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInNextTwelveMonths_d8e58024-2723-4226-80a6-ad8d1d8e8385" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_bdn_LongTermDebtMaturityAfterYearFour_429c0688-1c9c-4e26-abe3-291e4bfbbea4" xlink:href="bdn-20230630.xsd#bdn_LongTermDebtMaturityAfterYearFour"/>
    <link:calculationArc order="6" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_DebtInstrumentCarryingAmount_f0f3a529-b1ac-487b-bcc7-184ac47d38a3" xlink:to="loc_bdn_LongTermDebtMaturityAfterYearFour_429c0688-1c9c-4e26-abe3-291e4bfbbea4" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongTermDebt_5e3ba632-8e90-4de8-b3c4-e15378474aec" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_LongTermDebt"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentCarryingAmount_0dcf9f75-acc6-46d4-8506-a8c23c9a7e5b" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DebtInstrumentCarryingAmount"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_LongTermDebt_5e3ba632-8e90-4de8-b3c4-e15378474aec" xlink:to="loc_us-gaap_DebtInstrumentCarryingAmount_0dcf9f75-acc6-46d4-8506-a8c23c9a7e5b" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredFinanceCostsNet_d799b35a-96c5-4bf7-a137-78c896ab7aee" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.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_5e3ba632-8e90-4de8-b3c4-e15378474aec" xlink:to="loc_us-gaap_DeferredFinanceCostsNet_d799b35a-96c5-4bf7-a137-78c896ab7aee" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentUnamortizedDiscountPremiumNet_79fc9a23-c096-4e71-85a3-e4462611e706" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DebtInstrumentUnamortizedDiscountPremiumNet"/>
    <link:calculationArc order="3" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_LongTermDebt_5e3ba632-8e90-4de8-b3c4-e15378474aec" xlink:to="loc_us-gaap_DebtInstrumentUnamortizedDiscountPremiumNet_79fc9a23-c096-4e71-85a3-e4462611e706" xlink:type="arc"/>
  </link:calculationLink>
  <link:roleRef roleURI="http://www.brandywinerealty.com/role/BENEFICIARIESEQUITYOFTHEPARENTCOMPANYScheduleofNumberofSharesandNetIncomeUsedtoCalculateBasicandDilutedEarningsperShareDetails" xlink:type="simple" xlink:href="bdn-20230630.xsd#BENEFICIARIESEQUITYOFTHEPARENTCOMPANYScheduleofNumberofSharesandNetIncomeUsedtoCalculateBasicandDilutedEarningsperShareDetails"/>
  <link:calculationLink xlink:role="http://www.brandywinerealty.com/role/BENEFICIARIESEQUITYOFTHEPARENTCOMPANYScheduleofNumberofSharesandNetIncomeUsedtoCalculateBasicandDilutedEarningsperShareDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetIncomeLossAvailableToCommonStockholdersDiluted_6de49b07-a176-44fd-aadd-b434768f36b0" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_NetIncomeLossAvailableToCommonStockholdersDiluted"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ProfitLoss_4f47b454-25bf-4d28-9de4-8c10bcf365c6" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ProfitLoss"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetIncomeLossAvailableToCommonStockholdersDiluted_6de49b07-a176-44fd-aadd-b434768f36b0" xlink:to="loc_us-gaap_ProfitLoss_4f47b454-25bf-4d28-9de4-8c10bcf365c6" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_bdn_NetIncomeLossAttributableToNoncontrollingInterestDiluted_b5ea129f-3704-4410-b239-ac5bcc91a7e7" xlink:href="bdn-20230630.xsd#bdn_NetIncomeLossAttributableToNoncontrollingInterestDiluted"/>
    <link:calculationArc order="2" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetIncomeLossAvailableToCommonStockholdersDiluted_6de49b07-a176-44fd-aadd-b434768f36b0" xlink:to="loc_bdn_NetIncomeLossAttributableToNoncontrollingInterestDiluted_b5ea129f-3704-4410-b239-ac5bcc91a7e7" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_UndistributedEarningsLossAllocatedToParticipatingSecuritiesDiluted_a5e82611-a178-4545-9644-5f9275be419a" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_UndistributedEarningsLossAllocatedToParticipatingSecuritiesDiluted"/>
    <link:calculationArc order="3" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetIncomeLossAvailableToCommonStockholdersDiluted_6de49b07-a176-44fd-aadd-b434768f36b0" xlink:to="loc_us-gaap_UndistributedEarningsLossAllocatedToParticipatingSecuritiesDiluted_a5e82611-a178-4545-9644-5f9275be419a" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding_631e7a30-5488-41e9-996a-a365a3f6d477" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_WeightedAverageNumberOfSharesOutstandingBasic_4a878108-1b78-4acc-808a-8b0ed23ea761" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_WeightedAverageNumberOfSharesOutstandingBasic"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding_631e7a30-5488-41e9-996a-a365a3f6d477" xlink:to="loc_us-gaap_WeightedAverageNumberOfSharesOutstandingBasic_4a878108-1b78-4acc-808a-8b0ed23ea761" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncrementalCommonSharesAttributableToShareBasedPaymentArrangements_31e6bae5-8c9d-47db-aaac-32f2843774f6" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_IncrementalCommonSharesAttributableToShareBasedPaymentArrangements"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding_631e7a30-5488-41e9-996a-a365a3f6d477" xlink:to="loc_us-gaap_IncrementalCommonSharesAttributableToShareBasedPaymentArrangements_31e6bae5-8c9d-47db-aaac-32f2843774f6" xlink:type="arc"/>
  </link:calculationLink>
  <link:roleRef roleURI="http://www.brandywinerealty.com/role/PARTNERSEQUITYOFTHEPARENTCOMPANYScheduleofNumberofUnitsandNetIncomeUsedtoCalculateBasicandDilutedEarningsPerCommonPartnershipUnitDetails" xlink:type="simple" xlink:href="bdn-20230630.xsd#PARTNERSEQUITYOFTHEPARENTCOMPANYScheduleofNumberofUnitsandNetIncomeUsedtoCalculateBasicandDilutedEarningsPerCommonPartnershipUnitDetails"/>
  <link:calculationLink xlink:role="http://www.brandywinerealty.com/role/PARTNERSEQUITYOFTHEPARENTCOMPANYScheduleofNumberofUnitsandNetIncomeUsedtoCalculateBasicandDilutedEarningsPerCommonPartnershipUnitDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_bdn_NetIncomeLossAvailableToCommonUnitHoldersDiluted_bfee6553-f193-4ed5-a728-b292ac0678aa" xlink:href="bdn-20230630.xsd#bdn_NetIncomeLossAvailableToCommonUnitHoldersDiluted"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ProfitLoss_ba2e8c81-8b7f-4188-b9c0-5c63d80016a4" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ProfitLoss"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_bdn_NetIncomeLossAvailableToCommonUnitHoldersDiluted_bfee6553-f193-4ed5-a728-b292ac0678aa" xlink:to="loc_us-gaap_ProfitLoss_ba2e8c81-8b7f-4188-b9c0-5c63d80016a4" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NoncontrollingInterestInNetIncomeLossJointVenturePartnersRedeemable_e8ecf83e-f82e-4ee3-ab13-4da766efa78b" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_NoncontrollingInterestInNetIncomeLossJointVenturePartnersRedeemable"/>
    <link:calculationArc order="2" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_bdn_NetIncomeLossAvailableToCommonUnitHoldersDiluted_bfee6553-f193-4ed5-a728-b292ac0678aa" xlink:to="loc_us-gaap_NoncontrollingInterestInNetIncomeLossJointVenturePartnersRedeemable_e8ecf83e-f82e-4ee3-ab13-4da766efa78b" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_UndistributedEarningsLossAllocatedToParticipatingSecuritiesDiluted_64d6a0c2-d455-47c9-824a-c40f81931fa7" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_UndistributedEarningsLossAllocatedToParticipatingSecuritiesDiluted"/>
    <link:calculationArc order="3" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_bdn_NetIncomeLossAvailableToCommonUnitHoldersDiluted_bfee6553-f193-4ed5-a728-b292ac0678aa" xlink:to="loc_us-gaap_UndistributedEarningsLossAllocatedToParticipatingSecuritiesDiluted_64d6a0c2-d455-47c9-824a-c40f81931fa7" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_bdn_NetIncomeLossAvailableToCommonUnitholdersBasic_6e77dfb2-b250-43bb-bbda-f130387ad98d" xlink:href="bdn-20230630.xsd#bdn_NetIncomeLossAvailableToCommonUnitholdersBasic"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ProfitLoss_bf7417b9-ef5b-467b-ac73-6b16328f57bb" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ProfitLoss"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_bdn_NetIncomeLossAvailableToCommonUnitholdersBasic_6e77dfb2-b250-43bb-bbda-f130387ad98d" xlink:to="loc_us-gaap_ProfitLoss_bf7417b9-ef5b-467b-ac73-6b16328f57bb" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NoncontrollingInterestInNetIncomeLossJointVenturePartnersRedeemable_5ea22780-5608-480d-adbd-efa82c928758" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_NoncontrollingInterestInNetIncomeLossJointVenturePartnersRedeemable"/>
    <link:calculationArc order="2" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_bdn_NetIncomeLossAvailableToCommonUnitholdersBasic_6e77dfb2-b250-43bb-bbda-f130387ad98d" xlink:to="loc_us-gaap_NoncontrollingInterestInNetIncomeLossJointVenturePartnersRedeemable_5ea22780-5608-480d-adbd-efa82c928758" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_UndistributedEarningsLossAllocatedToParticipatingSecuritiesBasic_9b4cfe0d-98ad-46c8-970f-fffde5d57184" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_UndistributedEarningsLossAllocatedToParticipatingSecuritiesBasic"/>
    <link:calculationArc order="3" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_bdn_NetIncomeLossAvailableToCommonUnitholdersBasic_6e77dfb2-b250-43bb-bbda-f130387ad98d" xlink:to="loc_us-gaap_UndistributedEarningsLossAllocatedToParticipatingSecuritiesBasic_9b4cfe0d-98ad-46c8-970f-fffde5d57184" xlink:type="arc"/>
  </link:calculationLink>
  <link:roleRef roleURI="http://www.brandywinerealty.com/role/SEGMENTINFORMATIONNetOperatingIncomeofCompanysReportableSegmentsDetails" xlink:type="simple" xlink:href="bdn-20230630.xsd#SEGMENTINFORMATIONNetOperatingIncomeofCompanysReportableSegmentsDetails"/>
  <link:calculationLink xlink:role="http://www.brandywinerealty.com/role/SEGMENTINFORMATIONNetOperatingIncomeofCompanysReportableSegmentsDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_GrossProfit_b8e3018e-c767-480a-8309-5fb0805d0f46" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_GrossProfit"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_Revenues_f8250710-bf59-4881-8ee9-437b02474c3d" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_Revenues"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_GrossProfit_b8e3018e-c767-480a-8309-5fb0805d0f46" xlink:to="loc_us-gaap_Revenues_f8250710-bf59-4881-8ee9-437b02474c3d" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CostOfGoodsAndServicesSold_f317133f-2efd-4ff6-9827-c7b306aa4ba8" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_CostOfGoodsAndServicesSold"/>
    <link:calculationArc order="2" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_GrossProfit_b8e3018e-c767-480a-8309-5fb0805d0f46" xlink:to="loc_us-gaap_CostOfGoodsAndServicesSold_f317133f-2efd-4ff6-9827-c7b306aa4ba8" xlink:type="arc"/>
  </link:calculationLink>
</link:linkbase>
