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

<!--XBRL Document Created with Wdesk from Workiva-->
<!--Copyright 2017 Workiva-->
<!--r:bceb36b2-765a-4bf5-99c6-3efd1dc0e033,g:52e95324-885c-46c9-a7c7-8da61ce67eab-->
<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://hcsgcorp.com/role/DocumentandEntityInformation" xlink:type="simple" xlink:href="hcsg-20190331.xsd#DocumentandEntityInformation"/>
  <link:calculationLink xlink:role="http://hcsgcorp.com/role/DocumentandEntityInformation" xlink:type="extended"/>
  <link:roleRef roleURI="http://hcsgcorp.com/role/ConsolidatedBalanceSheets" xlink:type="simple" xlink:href="hcsg-20190331.xsd#ConsolidatedBalanceSheets"/>
  <link:calculationLink xlink:role="http://hcsgcorp.com/role/ConsolidatedBalanceSheets" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LiabilitiesCurrent_4b42a479-777f-4460-a606-189ccfdb9cb0" xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_LiabilitiesCurrent"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccountsPayableCurrent_a09f396b-9dc1-44e9-aa3f-80a9922e92d1" xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_AccountsPayableCurrent"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_LiabilitiesCurrent_4b42a479-777f-4460-a606-189ccfdb9cb0" xlink:to="loc_us-gaap_AccountsPayableCurrent_a09f396b-9dc1-44e9-aa3f-80a9922e92d1" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EmployeeRelatedLiabilitiesCurrent_d7e0e81f-6f6a-4f07-92b5-010356a67b59" xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_EmployeeRelatedLiabilitiesCurrent"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_LiabilitiesCurrent_4b42a479-777f-4460-a606-189ccfdb9cb0" xlink:to="loc_us-gaap_EmployeeRelatedLiabilitiesCurrent_d7e0e81f-6f6a-4f07-92b5-010356a67b59" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherAccruedLiabilitiesCurrent_0ed4ea93-1c1b-4316-86a8-ea90f31b2bd9" xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_OtherAccruedLiabilitiesCurrent"/>
    <link:calculationArc order="3" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_LiabilitiesCurrent_4b42a479-777f-4460-a606-189ccfdb9cb0" xlink:to="loc_us-gaap_OtherAccruedLiabilitiesCurrent_0ed4ea93-1c1b-4316-86a8-ea90f31b2bd9" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LineOfCredit_b8a4b43b-2fe5-440a-b980-60830898dbc9" xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_LineOfCredit"/>
    <link:calculationArc order="4" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_LiabilitiesCurrent_4b42a479-777f-4460-a606-189ccfdb9cb0" xlink:to="loc_us-gaap_LineOfCredit_b8a4b43b-2fe5-440a-b980-60830898dbc9" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccruedIncomeTaxesCurrent_9312e153-57db-4a9f-a014-cb932610956e" xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_AccruedIncomeTaxesCurrent"/>
    <link:calculationArc order="5" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_LiabilitiesCurrent_4b42a479-777f-4460-a606-189ccfdb9cb0" xlink:to="loc_us-gaap_AccruedIncomeTaxesCurrent_9312e153-57db-4a9f-a014-cb932610956e" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_WorkersCompensationLiabilityCurrent_bfa36d01-fa93-4e44-8515-26143d5997e9" xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_WorkersCompensationLiabilityCurrent"/>
    <link:calculationArc order="6" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_LiabilitiesCurrent_4b42a479-777f-4460-a606-189ccfdb9cb0" xlink:to="loc_us-gaap_WorkersCompensationLiabilityCurrent_bfa36d01-fa93-4e44-8515-26143d5997e9" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_Assets_544002cf-7952-43bb-a8d1-dc21de7891ae" xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_Assets"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AssetsCurrent_4770cc4b-ca72-4eb5-acae-e50381fbdf03" xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_AssetsCurrent"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_Assets_544002cf-7952-43bb-a8d1-dc21de7891ae" xlink:to="loc_us-gaap_AssetsCurrent_4770cc4b-ca72-4eb5-acae-e50381fbdf03" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentNet_a4d821b8-b26b-48b8-b8e5-3f1e9441c586" xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_PropertyPlantAndEquipmentNet"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_Assets_544002cf-7952-43bb-a8d1-dc21de7891ae" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentNet_a4d821b8-b26b-48b8-b8e5-3f1e9441c586" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_Goodwill_a5fa84f5-2a4b-4a80-9db8-f0124d334cb7" xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_Goodwill"/>
    <link:calculationArc order="3" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_Assets_544002cf-7952-43bb-a8d1-dc21de7891ae" xlink:to="loc_us-gaap_Goodwill_a5fa84f5-2a4b-4a80-9db8-f0124d334cb7" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsNet_ba4c2cce-4f9c-4ad8-9d89-2573e5875543" xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsNet"/>
    <link:calculationArc order="4" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_Assets_544002cf-7952-43bb-a8d1-dc21de7891ae" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsNet_ba4c2cce-4f9c-4ad8-9d89-2573e5875543" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NotesAndLoansReceivableNetNoncurrent_c9cc9e4a-4361-4a82-b24a-926392ce7d81" xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_NotesAndLoansReceivableNetNoncurrent"/>
    <link:calculationArc order="5" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_Assets_544002cf-7952-43bb-a8d1-dc21de7891ae" xlink:to="loc_us-gaap_NotesAndLoansReceivableNetNoncurrent_c9cc9e4a-4361-4a82-b24a-926392ce7d81" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredCompensationPlanAssets_85036396-df85-4d9c-8b32-6160a1cb3d43" xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DeferredCompensationPlanAssets"/>
    <link:calculationArc order="6" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_Assets_544002cf-7952-43bb-a8d1-dc21de7891ae" xlink:to="loc_us-gaap_DeferredCompensationPlanAssets_85036396-df85-4d9c-8b32-6160a1cb3d43" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredIncomeTaxAssetsNet_23d1c9ad-d6a4-4694-92f9-0796e6310617" xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DeferredIncomeTaxAssetsNet"/>
    <link:calculationArc order="7" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_Assets_544002cf-7952-43bb-a8d1-dc21de7891ae" xlink:to="loc_us-gaap_DeferredIncomeTaxAssetsNet_23d1c9ad-d6a4-4694-92f9-0796e6310617" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherAssetsNoncurrent_dccce3a2-dddd-4b8e-a321-d33905c237ad" xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_OtherAssetsNoncurrent"/>
    <link:calculationArc order="8" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_Assets_544002cf-7952-43bb-a8d1-dc21de7891ae" xlink:to="loc_us-gaap_OtherAssetsNoncurrent_dccce3a2-dddd-4b8e-a321-d33905c237ad" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LiabilitiesAndStockholdersEquity_c0182cd4-3999-4f94-b71f-747543710f28" xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_LiabilitiesAndStockholdersEquity"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LiabilitiesCurrent_c1a56fe8-43f2-4b85-9a10-d82bcf45b955" xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_LiabilitiesCurrent"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_LiabilitiesAndStockholdersEquity_c0182cd4-3999-4f94-b71f-747543710f28" xlink:to="loc_us-gaap_LiabilitiesCurrent_c1a56fe8-43f2-4b85-9a10-d82bcf45b955" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_WorkersCompensationLiabilityNoncurrent_688507bd-331a-494d-bee7-38cf38d1c92b" xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_WorkersCompensationLiabilityNoncurrent"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_LiabilitiesAndStockholdersEquity_c0182cd4-3999-4f94-b71f-747543710f28" xlink:to="loc_us-gaap_WorkersCompensationLiabilityNoncurrent_688507bd-331a-494d-bee7-38cf38d1c92b" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredCompensationLiabilityClassifiedNoncurrent_5a13b244-7711-4168-a9f8-b20af845afe2" xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DeferredCompensationLiabilityClassifiedNoncurrent"/>
    <link:calculationArc order="3" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_LiabilitiesAndStockholdersEquity_c0182cd4-3999-4f94-b71f-747543710f28" xlink:to="loc_us-gaap_DeferredCompensationLiabilityClassifiedNoncurrent_5a13b244-7711-4168-a9f8-b20af845afe2" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommitmentsAndContingencies_a84fa719-6ae0-4317-a64b-4e07313dee8d" xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.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_c0182cd4-3999-4f94-b71f-747543710f28" xlink:to="loc_us-gaap_CommitmentsAndContingencies_a84fa719-6ae0-4317-a64b-4e07313dee8d" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockholdersEquity_f8da5985-0f1f-4375-86f7-3e91dfac425e" xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_StockholdersEquity"/>
    <link:calculationArc order="5" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_LiabilitiesAndStockholdersEquity_c0182cd4-3999-4f94-b71f-747543710f28" xlink:to="loc_us-gaap_StockholdersEquity_f8da5985-0f1f-4375-86f7-3e91dfac425e" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockholdersEquity_7595bf60-fd74-4026-8cd4-f3da580f01a2" xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_StockholdersEquity"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonStockValue_0b29554e-f92d-46f2-9b73-cbd890f83ec0" xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_CommonStockValue"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_StockholdersEquity_7595bf60-fd74-4026-8cd4-f3da580f01a2" xlink:to="loc_us-gaap_CommonStockValue_0b29554e-f92d-46f2-9b73-cbd890f83ec0" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AdditionalPaidInCapitalCommonStock_3f7a35a3-ee34-4ff4-9caf-5657f45ea24e" xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_AdditionalPaidInCapitalCommonStock"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_StockholdersEquity_7595bf60-fd74-4026-8cd4-f3da580f01a2" xlink:to="loc_us-gaap_AdditionalPaidInCapitalCommonStock_3f7a35a3-ee34-4ff4-9caf-5657f45ea24e" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RetainedEarningsAccumulatedDeficit_b7e69662-16c0-4d65-990a-c5774f4b4584" xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_RetainedEarningsAccumulatedDeficit"/>
    <link:calculationArc order="3" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_StockholdersEquity_7595bf60-fd74-4026-8cd4-f3da580f01a2" xlink:to="loc_us-gaap_RetainedEarningsAccumulatedDeficit_b7e69662-16c0-4d65-990a-c5774f4b4584" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax_ca390c99-6b73-44d9-9b5c-7634fde8c438" xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax"/>
    <link:calculationArc order="4" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_StockholdersEquity_7595bf60-fd74-4026-8cd4-f3da580f01a2" xlink:to="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax_ca390c99-6b73-44d9-9b5c-7634fde8c438" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TreasuryStockValue_6287881e-0637-4432-b3a1-f4c749cc6c8b" xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_TreasuryStockValue"/>
    <link:calculationArc order="5" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_StockholdersEquity_7595bf60-fd74-4026-8cd4-f3da580f01a2" xlink:to="loc_us-gaap_TreasuryStockValue_6287881e-0637-4432-b3a1-f4c749cc6c8b" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AssetsCurrent_74888cb7-cec9-4aeb-b5f9-d47fd2f8a582" xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_AssetsCurrent"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents_c8f161b0-836d-4dfc-800a-329791c8bb80" xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_AssetsCurrent_74888cb7-cec9-4aeb-b5f9-d47fd2f8a582" xlink:to="loc_us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents_c8f161b0-836d-4dfc-800a-329791c8bb80" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_MarketableSecuritiesCurrent_60ec387d-d01a-43b7-9e11-230f0041b6fc" xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_MarketableSecuritiesCurrent"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_AssetsCurrent_74888cb7-cec9-4aeb-b5f9-d47fd2f8a582" xlink:to="loc_us-gaap_MarketableSecuritiesCurrent_60ec387d-d01a-43b7-9e11-230f0041b6fc" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccountsNotesAndLoansReceivableNetCurrent_8ab23010-d15e-4345-a567-31e055ce0012" xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_AccountsNotesAndLoansReceivableNetCurrent"/>
    <link:calculationArc order="3" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_AssetsCurrent_74888cb7-cec9-4aeb-b5f9-d47fd2f8a582" xlink:to="loc_us-gaap_AccountsNotesAndLoansReceivableNetCurrent_8ab23010-d15e-4345-a567-31e055ce0012" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherInventory_4c0ad8ed-e1f9-4c4e-9e97-568295374b27" xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_OtherInventory"/>
    <link:calculationArc order="4" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_AssetsCurrent_74888cb7-cec9-4aeb-b5f9-d47fd2f8a582" xlink:to="loc_us-gaap_OtherInventory_4c0ad8ed-e1f9-4c4e-9e97-568295374b27" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PrepaidExpenseCurrent_6c67a9db-060b-4772-9ea2-a9fc0beba49a" xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_PrepaidExpenseCurrent"/>
    <link:calculationArc order="5" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_AssetsCurrent_74888cb7-cec9-4aeb-b5f9-d47fd2f8a582" xlink:to="loc_us-gaap_PrepaidExpenseCurrent_6c67a9db-060b-4772-9ea2-a9fc0beba49a" xlink:type="arc"/>
  </link:calculationLink>
  <link:roleRef roleURI="http://hcsgcorp.com/role/ConsolidatedBalanceSheetsParenthetical" xlink:type="simple" xlink:href="hcsg-20190331.xsd#ConsolidatedBalanceSheetsParenthetical"/>
  <link:calculationLink xlink:role="http://hcsgcorp.com/role/ConsolidatedBalanceSheetsParenthetical" xlink:type="extended"/>
  <link:roleRef roleURI="http://hcsgcorp.com/role/ConsolidatedStatementsofComprehensiveIncome" xlink:type="simple" xlink:href="hcsg-20190331.xsd#ConsolidatedStatementsofComprehensiveIncome"/>
  <link:calculationLink xlink:role="http://hcsgcorp.com/role/ConsolidatedStatementsofComprehensiveIncome" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetIncomeLoss_c5dda88d-ddfa-40d6-9cd5-0b350a9b2396" xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_NetIncomeLoss"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments_bbea895a-51b4-40f1-956c-715ac87bd3b6" xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetIncomeLoss_c5dda88d-ddfa-40d6-9cd5-0b350a9b2396" xlink:to="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments_bbea895a-51b4-40f1-956c-715ac87bd3b6" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeTaxExpenseBenefit_b5d1e8b7-00e2-4fcf-a62c-c2eeba318abd" xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.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_NetIncomeLoss_c5dda88d-ddfa-40d6-9cd5-0b350a9b2396" xlink:to="loc_us-gaap_IncomeTaxExpenseBenefit_b5d1e8b7-00e2-4fcf-a62c-c2eeba318abd" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments_9d854198-a74d-4672-9b6b-18ffd42ac782" xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CostOfGoodsAndServicesSold_226e66e7-2a15-412f-aed1-06f0fadb15fb" xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_CostOfGoodsAndServicesSold"/>
    <link:calculationArc order="1" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments_9d854198-a74d-4672-9b6b-18ffd42ac782" xlink:to="loc_us-gaap_CostOfGoodsAndServicesSold_226e66e7-2a15-412f-aed1-06f0fadb15fb" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevenueFromContractWithCustomerIncludingAssessedTax_802735ac-00ef-412f-bd07-008c14dc71e4" xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_RevenueFromContractWithCustomerIncludingAssessedTax"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments_9d854198-a74d-4672-9b6b-18ffd42ac782" xlink:to="loc_us-gaap_RevenueFromContractWithCustomerIncludingAssessedTax_802735ac-00ef-412f-bd07-008c14dc71e4" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_hcsg_InvestmentIncomeAndOther_f98624ad-e18c-4edf-8b5b-a384b08c9cb2" xlink:href="hcsg-20190331.xsd#hcsg_InvestmentIncomeAndOther"/>
    <link:calculationArc order="3" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments_9d854198-a74d-4672-9b6b-18ffd42ac782" xlink:to="loc_hcsg_InvestmentIncomeAndOther_f98624ad-e18c-4edf-8b5b-a384b08c9cb2" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SellingGeneralAndAdministrativeExpense_6a1702ef-e2b5-4fd5-b333-268cd6b84a35" xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_SellingGeneralAndAdministrativeExpense"/>
    <link:calculationArc order="4" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments_9d854198-a74d-4672-9b6b-18ffd42ac782" xlink:to="loc_us-gaap_SellingGeneralAndAdministrativeExpense_6a1702ef-e2b5-4fd5-b333-268cd6b84a35" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InterestIncomeExpenseNonoperatingNet_6d7bd871-9eb9-44a1-a7f4-3ab0fd7fcb22" xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_InterestIncomeExpenseNonoperatingNet"/>
    <link:calculationArc order="5" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments_9d854198-a74d-4672-9b6b-18ffd42ac782" xlink:to="loc_us-gaap_InterestIncomeExpenseNonoperatingNet_6d7bd871-9eb9-44a1-a7f4-3ab0fd7fcb22" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeTaxExpenseBenefit_7710ddf5-fd9f-4687-a497-422b7eb80030" xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_IncomeTaxExpenseBenefit"/>
    <link:calculationArc order="6" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments_9d854198-a74d-4672-9b6b-18ffd42ac782" xlink:to="loc_us-gaap_IncomeTaxExpenseBenefit_7710ddf5-fd9f-4687-a497-422b7eb80030" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ComprehensiveIncomeNetOfTax_f3dbfc69-4fd7-4d95-bc1d-bb0b057155c4" xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ComprehensiveIncomeNetOfTax"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetIncomeLoss_cb99e938-e1f7-4d91-868f-3e19cef69630" xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_NetIncomeLoss"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_ComprehensiveIncomeNetOfTax_f3dbfc69-4fd7-4d95-bc1d-bb0b057155c4" xlink:to="loc_us-gaap_NetIncomeLoss_cb99e938-e1f7-4d91-868f-3e19cef69630" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax_5c85a85f-ee75-4023-a8cf-1a006eb93ce9" xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_ComprehensiveIncomeNetOfTax_f3dbfc69-4fd7-4d95-bc1d-bb0b057155c4" xlink:to="loc_us-gaap_OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax_5c85a85f-ee75-4023-a8cf-1a006eb93ce9" xlink:type="arc"/>
  </link:calculationLink>
  <link:roleRef roleURI="http://hcsgcorp.com/role/ConsolidatedStatementsofCashFlows" xlink:type="simple" xlink:href="hcsg-20190331.xsd#ConsolidatedStatementsofCashFlows"/>
  <link:calculationLink xlink:role="http://hcsgcorp.com/role/ConsolidatedStatementsofCashFlows" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetCashProvidedByUsedInFinancingActivities_46d45d02-1e94-401d-86aa-1823de75252a" xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_NetCashProvidedByUsedInFinancingActivities"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PaymentsOfDividendsCommonStock_ced64b37-4a80-4d1c-8a43-472818490222" xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_PaymentsOfDividendsCommonStock"/>
    <link:calculationArc order="1" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivities_46d45d02-1e94-401d-86aa-1823de75252a" xlink:to="loc_us-gaap_PaymentsOfDividendsCommonStock_ced64b37-4a80-4d1c-8a43-472818490222" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ProceedsFromIssuanceOfCommonStock_b7004b5e-df72-4992-8bc3-9faad3bf8043" xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ProceedsFromIssuanceOfCommonStock"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivities_46d45d02-1e94-401d-86aa-1823de75252a" xlink:to="loc_us-gaap_ProceedsFromIssuanceOfCommonStock_b7004b5e-df72-4992-8bc3-9faad3bf8043" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ProceedsFromStockOptionsExercised_32c1c175-d4bc-4190-822d-8d870ecdb6bd" xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ProceedsFromStockOptionsExercised"/>
    <link:calculationArc order="3" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivities_46d45d02-1e94-401d-86aa-1823de75252a" xlink:to="loc_us-gaap_ProceedsFromStockOptionsExercised_32c1c175-d4bc-4190-822d-8d870ecdb6bd" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ProceedsFromRepaymentsOfShortTermDebt_7861919f-4c94-486c-a28b-227520a724b4" xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ProceedsFromRepaymentsOfShortTermDebt"/>
    <link:calculationArc order="4" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivities_46d45d02-1e94-401d-86aa-1823de75252a" xlink:to="loc_us-gaap_ProceedsFromRepaymentsOfShortTermDebt_7861919f-4c94-486c-a28b-227520a724b4" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PaymentOfFinancingAndStockIssuanceCosts_46504d13-0b34-46db-9486-a8cc6c7a5c8f" xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_PaymentOfFinancingAndStockIssuanceCosts"/>
    <link:calculationArc order="5" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivities_46d45d02-1e94-401d-86aa-1823de75252a" xlink:to="loc_us-gaap_PaymentOfFinancingAndStockIssuanceCosts_46504d13-0b34-46db-9486-a8cc6c7a5c8f" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_616b6a0c-25a0-4f54-99f8-41c6affac140" xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_NetCashProvidedByUsedInOperatingActivities"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetIncomeLoss_a2da2e70-20b2-471a-8ad2-ddd130131449" xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_NetIncomeLoss"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_616b6a0c-25a0-4f54-99f8-41c6affac140" xlink:to="loc_us-gaap_NetIncomeLoss_a2da2e70-20b2-471a-8ad2-ddd130131449" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DepreciationDepletionAndAmortization_f10af0db-b270-4d8f-b9fc-63f0f25cb94a" xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DepreciationDepletionAndAmortization"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_616b6a0c-25a0-4f54-99f8-41c6affac140" xlink:to="loc_us-gaap_DepreciationDepletionAndAmortization_f10af0db-b270-4d8f-b9fc-63f0f25cb94a" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ProvisionForDoubtfulAccounts_936f39cc-b719-4f93-8fda-801a1a5a3863" xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ProvisionForDoubtfulAccounts"/>
    <link:calculationArc order="3" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_616b6a0c-25a0-4f54-99f8-41c6affac140" xlink:to="loc_us-gaap_ProvisionForDoubtfulAccounts_936f39cc-b719-4f93-8fda-801a1a5a3863" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensation_c82b7b15-ed0c-4a7d-b702-e1a8b5aba459" xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ShareBasedCompensation"/>
    <link:calculationArc order="4" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_616b6a0c-25a0-4f54-99f8-41c6affac140" xlink:to="loc_us-gaap_ShareBasedCompensation_c82b7b15-ed0c-4a7d-b702-e1a8b5aba459" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InvestmentIncomeAmortizationOfPremium_bd76d7ec-1d05-476e-a237-a4e38c884324" xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_InvestmentIncomeAmortizationOfPremium"/>
    <link:calculationArc order="5" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_616b6a0c-25a0-4f54-99f8-41c6affac140" xlink:to="loc_us-gaap_InvestmentIncomeAmortizationOfPremium_bd76d7ec-1d05-476e-a237-a4e38c884324" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_hcsg_UnrealizedGainLossOnSecuritiesRelatedToDeferredCompensationFund_c2be0b7c-281f-4e6c-90ff-82c857a7844a" xlink:href="hcsg-20190331.xsd#hcsg_UnrealizedGainLossOnSecuritiesRelatedToDeferredCompensationFund"/>
    <link:calculationArc order="6" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_616b6a0c-25a0-4f54-99f8-41c6affac140" xlink:to="loc_hcsg_UnrealizedGainLossOnSecuritiesRelatedToDeferredCompensationFund_c2be0b7c-281f-4e6c-90ff-82c857a7844a" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncreaseDecreaseInAccountsAndNotesReceivable_7f8ad199-f821-4f17-b1b9-ea257f0c4166" xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_IncreaseDecreaseInAccountsAndNotesReceivable"/>
    <link:calculationArc order="7" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_616b6a0c-25a0-4f54-99f8-41c6affac140" xlink:to="loc_us-gaap_IncreaseDecreaseInAccountsAndNotesReceivable_7f8ad199-f821-4f17-b1b9-ea257f0c4166" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncreaseDecreaseInInventories_23aaa7c9-ebb9-435b-a929-1b4da3841479" xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_IncreaseDecreaseInInventories"/>
    <link:calculationArc order="8" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_616b6a0c-25a0-4f54-99f8-41c6affac140" xlink:to="loc_us-gaap_IncreaseDecreaseInInventories_23aaa7c9-ebb9-435b-a929-1b4da3841479" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets_68e207de-f155-48ec-ae63-d4a83db99147" xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets"/>
    <link:calculationArc order="9" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_616b6a0c-25a0-4f54-99f8-41c6affac140" xlink:to="loc_us-gaap_IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets_68e207de-f155-48ec-ae63-d4a83db99147" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_hcsg_IncreaseDecreaseInDeferredCompensationFunding_447d4cb0-af4b-43df-a19f-e2905b54e792" xlink:href="hcsg-20190331.xsd#hcsg_IncreaseDecreaseInDeferredCompensationFunding"/>
    <link:calculationArc order="10" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_616b6a0c-25a0-4f54-99f8-41c6affac140" xlink:to="loc_hcsg_IncreaseDecreaseInDeferredCompensationFunding_447d4cb0-af4b-43df-a19f-e2905b54e792" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncreaseDecreaseInOtherAccountsPayableAndAccruedLiabilities_17eb439d-ba41-4b78-8d9e-91c59ff584a4" xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_IncreaseDecreaseInOtherAccountsPayableAndAccruedLiabilities"/>
    <link:calculationArc order="11" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_616b6a0c-25a0-4f54-99f8-41c6affac140" xlink:to="loc_us-gaap_IncreaseDecreaseInOtherAccountsPayableAndAccruedLiabilities_17eb439d-ba41-4b78-8d9e-91c59ff584a4" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncreaseDecreaseInOtherEmployeeRelatedLiabilities_bdf5b72a-2e56-48ee-9c4a-487857ac808f" xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_IncreaseDecreaseInOtherEmployeeRelatedLiabilities"/>
    <link:calculationArc order="12" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_616b6a0c-25a0-4f54-99f8-41c6affac140" xlink:to="loc_us-gaap_IncreaseDecreaseInOtherEmployeeRelatedLiabilities_bdf5b72a-2e56-48ee-9c4a-487857ac808f" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncreaseDecreaseInAccruedIncomeTaxesPayable_e7f192a0-e574-490f-a20d-d77c4d632539" xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_IncreaseDecreaseInAccruedIncomeTaxesPayable"/>
    <link:calculationArc order="13" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_616b6a0c-25a0-4f54-99f8-41c6affac140" xlink:to="loc_us-gaap_IncreaseDecreaseInAccruedIncomeTaxesPayable_e7f192a0-e574-490f-a20d-d77c4d632539" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncreaseDecreaseInWorkersCompensationLiabilities_161ca563-d602-4cb9-8f80-d1c134a38f3b" xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_IncreaseDecreaseInWorkersCompensationLiabilities"/>
    <link:calculationArc order="14" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_616b6a0c-25a0-4f54-99f8-41c6affac140" xlink:to="loc_us-gaap_IncreaseDecreaseInWorkersCompensationLiabilities_161ca563-d602-4cb9-8f80-d1c134a38f3b" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncreaseDecreaseInDeferredCompensation_f1b1849a-34b1-4b5b-989e-c9caffdcdf30" xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_IncreaseDecreaseInDeferredCompensation"/>
    <link:calculationArc order="15" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_616b6a0c-25a0-4f54-99f8-41c6affac140" xlink:to="loc_us-gaap_IncreaseDecreaseInDeferredCompensation_f1b1849a-34b1-4b5b-989e-c9caffdcdf30" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetCashProvidedByUsedInInvestingActivities_87666b94-cc72-4481-b95b-c11b4bcfffa8" xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_NetCashProvidedByUsedInInvestingActivities"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ProceedsFromSaleOfProductiveAssets_6175926a-e43e-4f2f-a42d-e3e955045e2e" xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ProceedsFromSaleOfProductiveAssets"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInInvestingActivities_87666b94-cc72-4481-b95b-c11b4bcfffa8" xlink:to="loc_us-gaap_ProceedsFromSaleOfProductiveAssets_6175926a-e43e-4f2f-a42d-e3e955045e2e" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PaymentsToAcquirePropertyPlantAndEquipment_645a4a5c-a4eb-4b6c-b916-75eb0aa24bee" xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_PaymentsToAcquirePropertyPlantAndEquipment"/>
    <link:calculationArc order="2" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInInvestingActivities_87666b94-cc72-4481-b95b-c11b4bcfffa8" xlink:to="loc_us-gaap_PaymentsToAcquirePropertyPlantAndEquipment_645a4a5c-a4eb-4b6c-b916-75eb0aa24bee" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PaymentsToAcquireMarketableSecurities_73223404-4b6b-4fc8-bd37-e9a4618d626d" xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_PaymentsToAcquireMarketableSecurities"/>
    <link:calculationArc order="3" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInInvestingActivities_87666b94-cc72-4481-b95b-c11b4bcfffa8" xlink:to="loc_us-gaap_PaymentsToAcquireMarketableSecurities_73223404-4b6b-4fc8-bd37-e9a4618d626d" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ProceedsFromSaleOfAvailableForSaleSecuritiesDebt_a7bcfca0-35a9-47b3-a0ec-cf5a82d1db2e" xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ProceedsFromSaleOfAvailableForSaleSecuritiesDebt"/>
    <link:calculationArc order="4" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInInvestingActivities_87666b94-cc72-4481-b95b-c11b4bcfffa8" xlink:to="loc_us-gaap_ProceedsFromSaleOfAvailableForSaleSecuritiesDebt_a7bcfca0-35a9-47b3-a0ec-cf5a82d1db2e" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect_b2d1b09d-4f08-4467-9aea-f32c777a165d" xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_a79e52df-200a-4c71-b599-f292eb3fb698" xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.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_b2d1b09d-4f08-4467-9aea-f32c777a165d" xlink:to="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_a79e52df-200a-4c71-b599-f292eb3fb698" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetCashProvidedByUsedInInvestingActivities_bc13d2f8-bc03-450b-ab59-a522ca81aa78" xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.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_b2d1b09d-4f08-4467-9aea-f32c777a165d" xlink:to="loc_us-gaap_NetCashProvidedByUsedInInvestingActivities_bc13d2f8-bc03-450b-ab59-a522ca81aa78" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetCashProvidedByUsedInFinancingActivities_81e032c5-c2ae-4ae8-bb38-548f5f117787" xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.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_b2d1b09d-4f08-4467-9aea-f32c777a165d" xlink:to="loc_us-gaap_NetCashProvidedByUsedInFinancingActivities_81e032c5-c2ae-4ae8-bb38-548f5f117787" xlink:type="arc"/>
  </link:calculationLink>
  <link:roleRef roleURI="http://hcsgcorp.com/role/ConsolidatedStatementsofStockholdersEquity" xlink:type="simple" xlink:href="hcsg-20190331.xsd#ConsolidatedStatementsofStockholdersEquity"/>
  <link:calculationLink xlink:role="http://hcsgcorp.com/role/ConsolidatedStatementsofStockholdersEquity" xlink:type="extended"/>
  <link:roleRef roleURI="http://hcsgcorp.com/role/DescriptionofBusinessandSignificantAccountingPolicies" xlink:type="simple" xlink:href="hcsg-20190331.xsd#DescriptionofBusinessandSignificantAccountingPolicies"/>
  <link:calculationLink xlink:role="http://hcsgcorp.com/role/DescriptionofBusinessandSignificantAccountingPolicies" xlink:type="extended"/>
  <link:roleRef roleURI="http://hcsgcorp.com/role/DescriptionofBusinessandSignificantAccountingPoliciesPolicies" xlink:type="simple" xlink:href="hcsg-20190331.xsd#DescriptionofBusinessandSignificantAccountingPoliciesPolicies"/>
  <link:calculationLink xlink:role="http://hcsgcorp.com/role/DescriptionofBusinessandSignificantAccountingPoliciesPolicies" xlink:type="extended"/>
  <link:roleRef roleURI="http://hcsgcorp.com/role/DescriptionofBusinessandSignificantAccountingPoliciesDetails" xlink:type="simple" xlink:href="hcsg-20190331.xsd#DescriptionofBusinessandSignificantAccountingPoliciesDetails"/>
  <link:calculationLink xlink:role="http://hcsgcorp.com/role/DescriptionofBusinessandSignificantAccountingPoliciesDetails" xlink:type="extended"/>
  <link:roleRef roleURI="http://hcsgcorp.com/role/Revenue" xlink:type="simple" xlink:href="hcsg-20190331.xsd#Revenue"/>
  <link:calculationLink xlink:role="http://hcsgcorp.com/role/Revenue" xlink:type="extended"/>
  <link:roleRef roleURI="http://hcsgcorp.com/role/RevenueNarrativeDetails" xlink:type="simple" xlink:href="hcsg-20190331.xsd#RevenueNarrativeDetails"/>
  <link:calculationLink xlink:role="http://hcsgcorp.com/role/RevenueNarrativeDetails" xlink:type="extended"/>
  <link:roleRef roleURI="http://hcsgcorp.com/role/RevenueRemainingPerformanceObligationDetails" xlink:type="simple" xlink:href="hcsg-20190331.xsd#RevenueRemainingPerformanceObligationDetails"/>
  <link:calculationLink xlink:role="http://hcsgcorp.com/role/RevenueRemainingPerformanceObligationDetails" xlink:type="extended"/>
  <link:roleRef roleURI="http://hcsgcorp.com/role/AccountsandNotesReceivable" xlink:type="simple" xlink:href="hcsg-20190331.xsd#AccountsandNotesReceivable"/>
  <link:calculationLink xlink:role="http://hcsgcorp.com/role/AccountsandNotesReceivable" xlink:type="extended"/>
  <link:roleRef roleURI="http://hcsgcorp.com/role/AccountsandNotesReceivableTables" xlink:type="simple" xlink:href="hcsg-20190331.xsd#AccountsandNotesReceivableTables"/>
  <link:calculationLink xlink:role="http://hcsgcorp.com/role/AccountsandNotesReceivableTables" xlink:type="extended"/>
  <link:roleRef roleURI="http://hcsgcorp.com/role/AccountsandNotesReceivableScheduleofAccountsandNotesReceivableDetails" xlink:type="simple" xlink:href="hcsg-20190331.xsd#AccountsandNotesReceivableScheduleofAccountsandNotesReceivableDetails"/>
  <link:calculationLink xlink:role="http://hcsgcorp.com/role/AccountsandNotesReceivableScheduleofAccountsandNotesReceivableDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccountsAndNotesReceivableNet_9cfece9e-2742-416e-97a5-b0cf7a9f497f" xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_AccountsAndNotesReceivableNet"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccountsNotesAndLoansReceivableNetCurrent_353a2394-0182-494b-9b25-a8437a29a992" xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_AccountsNotesAndLoansReceivableNetCurrent"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_AccountsAndNotesReceivableNet_9cfece9e-2742-416e-97a5-b0cf7a9f497f" xlink:to="loc_us-gaap_AccountsNotesAndLoansReceivableNetCurrent_353a2394-0182-494b-9b25-a8437a29a992" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NotesAndLoansReceivableNetNoncurrent_e6d41cc8-41fc-42b1-9f63-65a36d57bf3e" xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_NotesAndLoansReceivableNetNoncurrent"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_AccountsAndNotesReceivableNet_9cfece9e-2742-416e-97a5-b0cf7a9f497f" xlink:to="loc_us-gaap_NotesAndLoansReceivableNetNoncurrent_e6d41cc8-41fc-42b1-9f63-65a36d57bf3e" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccountsNotesAndLoansReceivableNetCurrent_ce96748c-ca14-4e1f-bf7a-1a76eeb01e33" xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_AccountsNotesAndLoansReceivableNetCurrent"/>
    <link:loc xlink:type="locator" xlink:label="loc_hcsg_AccountsNotesLoansandFinancingReceivableGrossCurrent_60dcc15b-d6f6-4192-b8ca-c2bc68271f68" xlink:href="hcsg-20190331.xsd#hcsg_AccountsNotesLoansandFinancingReceivableGrossCurrent"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_AccountsNotesAndLoansReceivableNetCurrent_ce96748c-ca14-4e1f-bf7a-1a76eeb01e33" xlink:to="loc_hcsg_AccountsNotesLoansandFinancingReceivableGrossCurrent_60dcc15b-d6f6-4192-b8ca-c2bc68271f68" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AllowanceForDoubtfulAccountsReceivableCurrent_03e4ca58-b506-4bf5-8b6c-5427e4dc4e87" xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_AllowanceForDoubtfulAccountsReceivableCurrent"/>
    <link:calculationArc order="2" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_AccountsNotesAndLoansReceivableNetCurrent_ce96748c-ca14-4e1f-bf7a-1a76eeb01e33" xlink:to="loc_us-gaap_AllowanceForDoubtfulAccountsReceivableCurrent_03e4ca58-b506-4bf5-8b6c-5427e4dc4e87" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NotesAndLoansReceivableNetNoncurrent_aad936a3-3367-4f22-b25c-56630b2611f8" xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_NotesAndLoansReceivableNetNoncurrent"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NotesAndLoansReceivableGrossNoncurrent_5a331e01-8ce8-47cb-951e-c1676d0b5330" xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_NotesAndLoansReceivableGrossNoncurrent"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NotesAndLoansReceivableNetNoncurrent_aad936a3-3367-4f22-b25c-56630b2611f8" xlink:to="loc_us-gaap_NotesAndLoansReceivableGrossNoncurrent_5a331e01-8ce8-47cb-951e-c1676d0b5330" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AllowanceForNotesAndLoansReceivableNoncurrent_6e394d64-9dcb-4c73-bd46-557d97c90f0d" xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_AllowanceForNotesAndLoansReceivableNoncurrent"/>
    <link:calculationArc order="2" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NotesAndLoansReceivableNetNoncurrent_aad936a3-3367-4f22-b25c-56630b2611f8" xlink:to="loc_us-gaap_AllowanceForNotesAndLoansReceivableNoncurrent_6e394d64-9dcb-4c73-bd46-557d97c90f0d" xlink:type="arc"/>
  </link:calculationLink>
  <link:roleRef roleURI="http://hcsgcorp.com/role/AccountsandNotesReceivableAdditionalInformationDetails" xlink:type="simple" xlink:href="hcsg-20190331.xsd#AccountsandNotesReceivableAdditionalInformationDetails"/>
  <link:calculationLink xlink:role="http://hcsgcorp.com/role/AccountsandNotesReceivableAdditionalInformationDetails" xlink:type="extended"/>
  <link:roleRef roleURI="http://hcsgcorp.com/role/AllowanceforDoubtfulAccounts" xlink:type="simple" xlink:href="hcsg-20190331.xsd#AllowanceforDoubtfulAccounts"/>
  <link:calculationLink xlink:role="http://hcsgcorp.com/role/AllowanceforDoubtfulAccounts" xlink:type="extended"/>
  <link:roleRef roleURI="http://hcsgcorp.com/role/AllowanceforDoubtfulAccountsNarrativeDetails" xlink:type="simple" xlink:href="hcsg-20190331.xsd#AllowanceforDoubtfulAccountsNarrativeDetails"/>
  <link:calculationLink xlink:role="http://hcsgcorp.com/role/AllowanceforDoubtfulAccountsNarrativeDetails" xlink:type="extended"/>
  <link:roleRef roleURI="http://hcsgcorp.com/role/ChangesinAccumulatedOtherComprehensiveIncomebyComponent" xlink:type="simple" xlink:href="hcsg-20190331.xsd#ChangesinAccumulatedOtherComprehensiveIncomebyComponent"/>
  <link:calculationLink xlink:role="http://hcsgcorp.com/role/ChangesinAccumulatedOtherComprehensiveIncomebyComponent" xlink:type="extended"/>
  <link:roleRef roleURI="http://hcsgcorp.com/role/ChangesinAccumulatedOtherComprehensiveIncomebyComponentTables" xlink:type="simple" xlink:href="hcsg-20190331.xsd#ChangesinAccumulatedOtherComprehensiveIncomebyComponentTables"/>
  <link:calculationLink xlink:role="http://hcsgcorp.com/role/ChangesinAccumulatedOtherComprehensiveIncomebyComponentTables" xlink:type="extended"/>
  <link:roleRef roleURI="http://hcsgcorp.com/role/ChangesinAccumulatedOtherComprehensiveIncomebyComponentSummaryDetails" xlink:type="simple" xlink:href="hcsg-20190331.xsd#ChangesinAccumulatedOtherComprehensiveIncomebyComponentSummaryDetails"/>
  <link:calculationLink xlink:role="http://hcsgcorp.com/role/ChangesinAccumulatedOtherComprehensiveIncomebyComponentSummaryDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent_2d6abdb6-0cde-47cf-bcce-2c3b2196d727" xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OciBeforeReclassificationsNetOfTaxAttributableToParent_1998faeb-ebf2-4d65-a615-6b81797a46ae" xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_OciBeforeReclassificationsNetOfTaxAttributableToParent"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent_2d6abdb6-0cde-47cf-bcce-2c3b2196d727" xlink:to="loc_us-gaap_OciBeforeReclassificationsNetOfTaxAttributableToParent_1998faeb-ebf2-4d65-a615-6b81797a46ae" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ReclassificationFromAociCurrentPeriodNetOfTaxAttributableToParent_64e36e82-21ae-4c5a-bc6e-39188727064d" xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ReclassificationFromAociCurrentPeriodNetOfTaxAttributableToParent"/>
    <link:calculationArc order="2" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent_2d6abdb6-0cde-47cf-bcce-2c3b2196d727" xlink:to="loc_us-gaap_ReclassificationFromAociCurrentPeriodNetOfTaxAttributableToParent_64e36e82-21ae-4c5a-bc6e-39188727064d" xlink:type="arc"/>
  </link:calculationLink>
  <link:roleRef roleURI="http://hcsgcorp.com/role/ChangesinAccumulatedOtherComprehensiveIncomebyComponentReclassificationAdjustmentsDetails" xlink:type="simple" xlink:href="hcsg-20190331.xsd#ChangesinAccumulatedOtherComprehensiveIncomebyComponentReclassificationAdjustmentsDetails"/>
  <link:calculationLink xlink:role="http://hcsgcorp.com/role/ChangesinAccumulatedOtherComprehensiveIncomebyComponentReclassificationAdjustmentsDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetIncomeLoss_b2dca9a0-9d39-45a7-a9c7-90c2a4910f5b" xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_NetIncomeLoss"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeTaxExpenseBenefit_6b9df12c-1fca-4e95-8aeb-23112e6bccaa" xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_IncomeTaxExpenseBenefit"/>
    <link:calculationArc order="1" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetIncomeLoss_b2dca9a0-9d39-45a7-a9c7-90c2a4910f5b" xlink:to="loc_us-gaap_IncomeTaxExpenseBenefit_6b9df12c-1fca-4e95-8aeb-23112e6bccaa" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtSecuritiesGainLossExcludingOtti_df03def5-77ea-4be8-b107-06cf35bcf4e7" xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DebtSecuritiesGainLossExcludingOtti"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetIncomeLoss_b2dca9a0-9d39-45a7-a9c7-90c2a4910f5b" xlink:to="loc_us-gaap_DebtSecuritiesGainLossExcludingOtti_df03def5-77ea-4be8-b107-06cf35bcf4e7" xlink:type="arc"/>
  </link:calculationLink>
  <link:roleRef roleURI="http://hcsgcorp.com/role/PropertyandEquipment" xlink:type="simple" xlink:href="hcsg-20190331.xsd#PropertyandEquipment"/>
  <link:calculationLink xlink:role="http://hcsgcorp.com/role/PropertyandEquipment" xlink:type="extended"/>
  <link:roleRef roleURI="http://hcsgcorp.com/role/PropertyandEquipmentTables" xlink:type="simple" xlink:href="hcsg-20190331.xsd#PropertyandEquipmentTables"/>
  <link:calculationLink xlink:role="http://hcsgcorp.com/role/PropertyandEquipmentTables" xlink:type="extended"/>
  <link:roleRef roleURI="http://hcsgcorp.com/role/PropertyandEquipmentDetails" xlink:type="simple" xlink:href="hcsg-20190331.xsd#PropertyandEquipmentDetails"/>
  <link:calculationLink xlink:role="http://hcsgcorp.com/role/PropertyandEquipmentDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentNet_d5405dc8-4d49-465d-808a-f83c2b523195" xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_PropertyPlantAndEquipmentNet"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentGross_905c1adb-3717-429e-91c8-0517ea44ba94" xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_PropertyPlantAndEquipmentGross"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentNet_d5405dc8-4d49-465d-808a-f83c2b523195" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentGross_905c1adb-3717-429e-91c8-0517ea44ba94" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment_87faf815-6d60-4489-a867-1c6f3b6eaf08" xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment"/>
    <link:calculationArc order="2" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentNet_d5405dc8-4d49-465d-808a-f83c2b523195" xlink:to="loc_us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment_87faf815-6d60-4489-a867-1c6f3b6eaf08" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingLeaseRightOfUseAsset_1acc7a12-d037-417d-8cb4-561a44a5f6eb" xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_OperatingLeaseRightOfUseAsset"/>
    <link:calculationArc order="3" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentNet_d5405dc8-4d49-465d-808a-f83c2b523195" xlink:to="loc_us-gaap_OperatingLeaseRightOfUseAsset_1acc7a12-d037-417d-8cb4-561a44a5f6eb" xlink:type="arc"/>
  </link:calculationLink>
  <link:roleRef roleURI="http://hcsgcorp.com/role/Leases" xlink:type="simple" xlink:href="hcsg-20190331.xsd#Leases"/>
  <link:calculationLink xlink:role="http://hcsgcorp.com/role/Leases" xlink:type="extended"/>
  <link:roleRef roleURI="http://hcsgcorp.com/role/LeasesTables" xlink:type="simple" xlink:href="hcsg-20190331.xsd#LeasesTables"/>
  <link:calculationLink xlink:role="http://hcsgcorp.com/role/LeasesTables" xlink:type="extended"/>
  <link:roleRef roleURI="http://hcsgcorp.com/role/LeasesAdditionalInformationDetails" xlink:type="simple" xlink:href="hcsg-20190331.xsd#LeasesAdditionalInformationDetails"/>
  <link:calculationLink xlink:role="http://hcsgcorp.com/role/LeasesAdditionalInformationDetails" xlink:type="extended"/>
  <link:roleRef roleURI="http://hcsgcorp.com/role/LeasesComponentsofLeaseExpenseDetails" xlink:type="simple" xlink:href="hcsg-20190331.xsd#LeasesComponentsofLeaseExpenseDetails"/>
  <link:calculationLink xlink:role="http://hcsgcorp.com/role/LeasesComponentsofLeaseExpenseDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LeaseCost_50bdb0fa-8697-4fe3-87b1-f10749189c82" xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_LeaseCost"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_VariableLeaseCost_0685f54b-a0aa-4c7e-a839-12ea32687e26" xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_VariableLeaseCost"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_LeaseCost_50bdb0fa-8697-4fe3-87b1-f10749189c82" xlink:to="loc_us-gaap_VariableLeaseCost_0685f54b-a0aa-4c7e-a839-12ea32687e26" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingLeaseCost_6b9f94b9-313b-4ef5-806d-358aacedd14d" xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_OperatingLeaseCost"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_LeaseCost_50bdb0fa-8697-4fe3-87b1-f10749189c82" xlink:to="loc_us-gaap_OperatingLeaseCost_6b9f94b9-313b-4ef5-806d-358aacedd14d" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShortTermLeaseCost_755c4fef-5386-41d2-b026-7a2c54d041b5" xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ShortTermLeaseCost"/>
    <link:calculationArc order="3" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_LeaseCost_50bdb0fa-8697-4fe3-87b1-f10749189c82" xlink:to="loc_us-gaap_ShortTermLeaseCost_755c4fef-5386-41d2-b026-7a2c54d041b5" xlink:type="arc"/>
  </link:calculationLink>
  <link:roleRef roleURI="http://hcsgcorp.com/role/LeasesScheduleofFutureMinimumLeasePaymentsDetails" xlink:type="simple" xlink:href="hcsg-20190331.xsd#LeasesScheduleofFutureMinimumLeasePaymentsDetails"/>
  <link:calculationLink xlink:role="http://hcsgcorp.com/role/LeasesScheduleofFutureMinimumLeasePaymentsDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDue_2909e741-457f-4a21-8826-cbf81fc91d1c" xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_LesseeOperatingLeaseLiabilityPaymentsDue"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LesseeOperatingLeaseLiabilityPaymentsRemainderOfFiscalYear_837d1d54-b6f2-4a6f-85a7-49a1ea9ba57b" xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_LesseeOperatingLeaseLiabilityPaymentsRemainderOfFiscalYear"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDue_2909e741-457f-4a21-8826-cbf81fc91d1c" xlink:to="loc_us-gaap_LesseeOperatingLeaseLiabilityPaymentsRemainderOfFiscalYear_837d1d54-b6f2-4a6f-85a7-49a1ea9ba57b" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearTwo_ed8954a4-bf4a-44c0-bb2d-19d81762079f" xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearTwo"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDue_2909e741-457f-4a21-8826-cbf81fc91d1c" xlink:to="loc_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearTwo_ed8954a4-bf4a-44c0-bb2d-19d81762079f" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearThree_89b85f1f-17d4-4b42-ac2e-38eb1faa9942" xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearThree"/>
    <link:calculationArc order="3" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDue_2909e741-457f-4a21-8826-cbf81fc91d1c" xlink:to="loc_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearThree_89b85f1f-17d4-4b42-ac2e-38eb1faa9942" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearFour_99a0f663-b0c7-4e5f-9a46-9818df8ad391" xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearFour"/>
    <link:calculationArc order="4" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDue_2909e741-457f-4a21-8826-cbf81fc91d1c" xlink:to="loc_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearFour_99a0f663-b0c7-4e5f-9a46-9818df8ad391" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearFive_cf3bdef9-8d51-46f0-a92d-6d56da68f57b" xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearFive"/>
    <link:calculationArc order="5" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDue_2909e741-457f-4a21-8826-cbf81fc91d1c" xlink:to="loc_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearFive_cf3bdef9-8d51-46f0-a92d-6d56da68f57b" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_hcsg_LesseeOperatingLeaseLiabilityPaymentsDueYearSix_c3b58d7b-49d0-4b2f-b4f3-710081de65bd" xlink:href="hcsg-20190331.xsd#hcsg_LesseeOperatingLeaseLiabilityPaymentsDueYearSix"/>
    <link:calculationArc order="6" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDue_2909e741-457f-4a21-8826-cbf81fc91d1c" xlink:to="loc_hcsg_LesseeOperatingLeaseLiabilityPaymentsDueYearSix_c3b58d7b-49d0-4b2f-b4f3-710081de65bd" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_hcsg_LesseeOperatingLeaseLiabilityPaymentsDueAfterYearSix_04204d9b-9831-421d-aece-00c2fa5cfd4b" xlink:href="hcsg-20190331.xsd#hcsg_LesseeOperatingLeaseLiabilityPaymentsDueAfterYearSix"/>
    <link:calculationArc order="7" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDue_2909e741-457f-4a21-8826-cbf81fc91d1c" xlink:to="loc_hcsg_LesseeOperatingLeaseLiabilityPaymentsDueAfterYearSix_04204d9b-9831-421d-aece-00c2fa5cfd4b" xlink:type="arc"/>
  </link:calculationLink>
  <link:roleRef roleURI="http://hcsgcorp.com/role/OtherIntangibleAssets" xlink:type="simple" xlink:href="hcsg-20190331.xsd#OtherIntangibleAssets"/>
  <link:calculationLink xlink:role="http://hcsgcorp.com/role/OtherIntangibleAssets" xlink:type="extended"/>
  <link:roleRef roleURI="http://hcsgcorp.com/role/OtherIntangibleAssetsTables" xlink:type="simple" xlink:href="hcsg-20190331.xsd#OtherIntangibleAssetsTables"/>
  <link:calculationLink xlink:role="http://hcsgcorp.com/role/OtherIntangibleAssetsTables" xlink:type="extended"/>
  <link:roleRef roleURI="http://hcsgcorp.com/role/OtherIntangibleAssetsAdditionalInformationDetails" xlink:type="simple" xlink:href="hcsg-20190331.xsd#OtherIntangibleAssetsAdditionalInformationDetails"/>
  <link:calculationLink xlink:role="http://hcsgcorp.com/role/OtherIntangibleAssetsAdditionalInformationDetails" xlink:type="extended"/>
  <link:roleRef roleURI="http://hcsgcorp.com/role/OtherIntangibleAssetsEstimatedAmortizationExpenseForIntangiblesSubjectToAmortizationDetails" xlink:type="simple" xlink:href="hcsg-20190331.xsd#OtherIntangibleAssetsEstimatedAmortizationExpenseForIntangiblesSubjectToAmortizationDetails"/>
  <link:calculationLink xlink:role="http://hcsgcorp.com/role/OtherIntangibleAssetsEstimatedAmortizationExpenseForIntangiblesSubjectToAmortizationDetails" xlink:type="extended"/>
  <link:roleRef roleURI="http://hcsgcorp.com/role/FairValueMeasurements" xlink:type="simple" xlink:href="hcsg-20190331.xsd#FairValueMeasurements"/>
  <link:calculationLink xlink:role="http://hcsgcorp.com/role/FairValueMeasurements" xlink:type="extended"/>
  <link:roleRef roleURI="http://hcsgcorp.com/role/FairValueMeasurementsTables" xlink:type="simple" xlink:href="hcsg-20190331.xsd#FairValueMeasurementsTables"/>
  <link:calculationLink xlink:role="http://hcsgcorp.com/role/FairValueMeasurementsTables" xlink:type="extended"/>
  <link:roleRef roleURI="http://hcsgcorp.com/role/FairValueMeasurementsAdditionalInformationDetails" xlink:type="simple" xlink:href="hcsg-20190331.xsd#FairValueMeasurementsAdditionalInformationDetails"/>
  <link:calculationLink xlink:role="http://hcsgcorp.com/role/FairValueMeasurementsAdditionalInformationDetails" xlink:type="extended"/>
  <link:roleRef roleURI="http://hcsgcorp.com/role/FairValueMeasurementsMarketableSecuritiesandDeferredCompensationFundInvestmentsDetails" xlink:type="simple" xlink:href="hcsg-20190331.xsd#FairValueMeasurementsMarketableSecuritiesandDeferredCompensationFundInvestmentsDetails"/>
  <link:calculationLink xlink:role="http://hcsgcorp.com/role/FairValueMeasurementsMarketableSecuritiesandDeferredCompensationFundInvestmentsDetails" xlink:type="extended"/>
  <link:roleRef roleURI="http://hcsgcorp.com/role/FairValueMeasurementsMarketableDebtSecuritiesDetails" xlink:type="simple" xlink:href="hcsg-20190331.xsd#FairValueMeasurementsMarketableDebtSecuritiesDetails"/>
  <link:calculationLink xlink:role="http://hcsgcorp.com/role/FairValueMeasurementsMarketableDebtSecuritiesDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AvailableForSaleDebtSecuritiesAmortizedCostBasis_fbd5ac57-f950-4f02-a641-4167d51f0608" xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_AvailableForSaleDebtSecuritiesAmortizedCostBasis"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax_f3e88ba2-1991-4e3b-96af-657787511804" xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax"/>
    <link:calculationArc order="1" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_AvailableForSaleDebtSecuritiesAmortizedCostBasis_fbd5ac57-f950-4f02-a641-4167d51f0608" xlink:to="loc_us-gaap_AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax_f3e88ba2-1991-4e3b-96af-657787511804" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedLossBeforeTax_0c1c5014-ef28-4466-8ba2-4628a1bc32e5" xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedLossBeforeTax"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_AvailableForSaleDebtSecuritiesAmortizedCostBasis_fbd5ac57-f950-4f02-a641-4167d51f0608" xlink:to="loc_us-gaap_AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedLossBeforeTax_0c1c5014-ef28-4466-8ba2-4628a1bc32e5" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AvailableForSaleSecuritiesDebtSecurities_8a0de2b9-0eb4-40a2-b5d2-55baf1ac6cc8" xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_AvailableForSaleSecuritiesDebtSecurities"/>
    <link:calculationArc order="3" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_AvailableForSaleDebtSecuritiesAmortizedCostBasis_fbd5ac57-f950-4f02-a641-4167d51f0608" xlink:to="loc_us-gaap_AvailableForSaleSecuritiesDebtSecurities_8a0de2b9-0eb4-40a2-b5d2-55baf1ac6cc8" xlink:type="arc"/>
  </link:calculationLink>
  <link:roleRef roleURI="http://hcsgcorp.com/role/FairValueMeasurementsContractualMaturitiesofDebtSecuritiesDetails" xlink:type="simple" xlink:href="hcsg-20190331.xsd#FairValueMeasurementsContractualMaturitiesofDebtSecuritiesDetails"/>
  <link:calculationLink xlink:role="http://hcsgcorp.com/role/FairValueMeasurementsContractualMaturitiesofDebtSecuritiesDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AvailableForSaleSecuritiesDebtSecurities_1cf43e77-35b5-4ce3-b1ca-36f7ddc817d8" xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_AvailableForSaleSecuritiesDebtSecurities"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AvailableForSaleSecuritiesDebtMaturitiesAfterOneThroughFiveYearsFairValue_22483969-caa4-41e4-93e4-51bb2de59ba0" xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_AvailableForSaleSecuritiesDebtMaturitiesAfterOneThroughFiveYearsFairValue"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_AvailableForSaleSecuritiesDebtSecurities_1cf43e77-35b5-4ce3-b1ca-36f7ddc817d8" xlink:to="loc_us-gaap_AvailableForSaleSecuritiesDebtMaturitiesAfterOneThroughFiveYearsFairValue_22483969-caa4-41e4-93e4-51bb2de59ba0" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AvailableForSaleSecuritiesDebtMaturitiesAfterTenYearsFairValue_ae52169c-179b-4db3-81a0-78f6272ba149" xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_AvailableForSaleSecuritiesDebtMaturitiesAfterTenYearsFairValue"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_AvailableForSaleSecuritiesDebtSecurities_1cf43e77-35b5-4ce3-b1ca-36f7ddc817d8" xlink:to="loc_us-gaap_AvailableForSaleSecuritiesDebtMaturitiesAfterTenYearsFairValue_ae52169c-179b-4db3-81a0-78f6272ba149" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AvailableForSaleSecuritiesDebtMaturitiesWithinOneYearFairValue_f16f30e2-16b7-47cd-886f-fb619b2111fe" xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_AvailableForSaleSecuritiesDebtMaturitiesWithinOneYearFairValue"/>
    <link:calculationArc order="3" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_AvailableForSaleSecuritiesDebtSecurities_1cf43e77-35b5-4ce3-b1ca-36f7ddc817d8" xlink:to="loc_us-gaap_AvailableForSaleSecuritiesDebtMaturitiesWithinOneYearFairValue_f16f30e2-16b7-47cd-886f-fb619b2111fe" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AvailableForSaleSecuritiesDebtMaturitiesAfterFiveThroughTenYearsFairValue_cf54ae15-aa5c-42f7-baf2-de552d0d357d" xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_AvailableForSaleSecuritiesDebtMaturitiesAfterFiveThroughTenYearsFairValue"/>
    <link:calculationArc order="4" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_AvailableForSaleSecuritiesDebtSecurities_1cf43e77-35b5-4ce3-b1ca-36f7ddc817d8" xlink:to="loc_us-gaap_AvailableForSaleSecuritiesDebtMaturitiesAfterFiveThroughTenYearsFairValue_cf54ae15-aa5c-42f7-baf2-de552d0d357d" xlink:type="arc"/>
  </link:calculationLink>
  <link:roleRef roleURI="http://hcsgcorp.com/role/StockBasedCompensation" xlink:type="simple" xlink:href="hcsg-20190331.xsd#StockBasedCompensation"/>
  <link:calculationLink xlink:role="http://hcsgcorp.com/role/StockBasedCompensation" xlink:type="extended"/>
  <link:roleRef roleURI="http://hcsgcorp.com/role/StockBasedCompensationTables" xlink:type="simple" xlink:href="hcsg-20190331.xsd#StockBasedCompensationTables"/>
  <link:calculationLink xlink:role="http://hcsgcorp.com/role/StockBasedCompensationTables" xlink:type="extended"/>
  <link:roleRef roleURI="http://hcsgcorp.com/role/StockBasedCompensationSummaryofStockBasedCompensationExpenseDetails" xlink:type="simple" xlink:href="hcsg-20190331.xsd#StockBasedCompensationSummaryofStockBasedCompensationExpenseDetails"/>
  <link:calculationLink xlink:role="http://hcsgcorp.com/role/StockBasedCompensationSummaryofStockBasedCompensationExpenseDetails" xlink:type="extended"/>
  <link:roleRef roleURI="http://hcsgcorp.com/role/StockBasedCompensationAdditionalInformationDetails" xlink:type="simple" xlink:href="hcsg-20190331.xsd#StockBasedCompensationAdditionalInformationDetails"/>
  <link:calculationLink xlink:role="http://hcsgcorp.com/role/StockBasedCompensationAdditionalInformationDetails" xlink:type="extended"/>
  <link:roleRef roleURI="http://hcsgcorp.com/role/StockBasedCompensationSummaryofStockOptionsOutstandingDetails" xlink:type="simple" xlink:href="hcsg-20190331.xsd#StockBasedCompensationSummaryofStockOptionsOutstandingDetails"/>
  <link:calculationLink xlink:role="http://hcsgcorp.com/role/StockBasedCompensationSummaryofStockOptionsOutstandingDetails" xlink:type="extended"/>
  <link:roleRef roleURI="http://hcsgcorp.com/role/StockBasedCompensationAssumptionsforFairValueofOptionsGrantedDetails" xlink:type="simple" xlink:href="hcsg-20190331.xsd#StockBasedCompensationAssumptionsforFairValueofOptionsGrantedDetails"/>
  <link:calculationLink xlink:role="http://hcsgcorp.com/role/StockBasedCompensationAssumptionsforFairValueofOptionsGrantedDetails" xlink:type="extended"/>
  <link:roleRef roleURI="http://hcsgcorp.com/role/StockBasedCompensationSummarizedInformationAboutStockAwardsDetails" xlink:type="simple" xlink:href="hcsg-20190331.xsd#StockBasedCompensationSummarizedInformationAboutStockAwardsDetails"/>
  <link:calculationLink xlink:role="http://hcsgcorp.com/role/StockBasedCompensationSummarizedInformationAboutStockAwardsDetails" xlink:type="extended"/>
  <link:roleRef roleURI="http://hcsgcorp.com/role/StockBasedCompensationSummaryofRestrictedStockUnitsandRestrictedStockDetails" xlink:type="simple" xlink:href="hcsg-20190331.xsd#StockBasedCompensationSummaryofRestrictedStockUnitsandRestrictedStockDetails"/>
  <link:calculationLink xlink:role="http://hcsgcorp.com/role/StockBasedCompensationSummaryofRestrictedStockUnitsandRestrictedStockDetails" xlink:type="extended"/>
  <link:roleRef roleURI="http://hcsgcorp.com/role/StockBasedCompensationAssumptionsForEmployeeStockPurchasePlanDetails" xlink:type="simple" xlink:href="hcsg-20190331.xsd#StockBasedCompensationAssumptionsForEmployeeStockPurchasePlanDetails"/>
  <link:calculationLink xlink:role="http://hcsgcorp.com/role/StockBasedCompensationAssumptionsForEmployeeStockPurchasePlanDetails" xlink:type="extended"/>
  <link:roleRef roleURI="http://hcsgcorp.com/role/StockBasedCompensationDeferredCompensationPlanDetails" xlink:type="simple" xlink:href="hcsg-20190331.xsd#StockBasedCompensationDeferredCompensationPlanDetails"/>
  <link:calculationLink xlink:role="http://hcsgcorp.com/role/StockBasedCompensationDeferredCompensationPlanDetails" xlink:type="extended"/>
  <link:roleRef roleURI="http://hcsgcorp.com/role/Dividends" xlink:type="simple" xlink:href="hcsg-20190331.xsd#Dividends"/>
  <link:calculationLink xlink:role="http://hcsgcorp.com/role/Dividends" xlink:type="extended"/>
  <link:roleRef roleURI="http://hcsgcorp.com/role/DividendsTables" xlink:type="simple" xlink:href="hcsg-20190331.xsd#DividendsTables"/>
  <link:calculationLink xlink:role="http://hcsgcorp.com/role/DividendsTables" xlink:type="extended"/>
  <link:roleRef roleURI="http://hcsgcorp.com/role/DividendsAdditionalInformationDetails" xlink:type="simple" xlink:href="hcsg-20190331.xsd#DividendsAdditionalInformationDetails"/>
  <link:calculationLink xlink:role="http://hcsgcorp.com/role/DividendsAdditionalInformationDetails" xlink:type="extended"/>
  <link:roleRef roleURI="http://hcsgcorp.com/role/DividendsScheduleofDividendsDetails" xlink:type="simple" xlink:href="hcsg-20190331.xsd#DividendsScheduleofDividendsDetails"/>
  <link:calculationLink xlink:role="http://hcsgcorp.com/role/DividendsScheduleofDividendsDetails" xlink:type="extended"/>
  <link:roleRef roleURI="http://hcsgcorp.com/role/DividendsCashDividendsperCommonShareDetails" xlink:type="simple" xlink:href="hcsg-20190331.xsd#DividendsCashDividendsperCommonShareDetails"/>
  <link:calculationLink xlink:role="http://hcsgcorp.com/role/DividendsCashDividendsperCommonShareDetails" xlink:type="extended"/>
  <link:roleRef roleURI="http://hcsgcorp.com/role/IncomeTaxes" xlink:type="simple" xlink:href="hcsg-20190331.xsd#IncomeTaxes"/>
  <link:calculationLink xlink:role="http://hcsgcorp.com/role/IncomeTaxes" xlink:type="extended"/>
  <link:roleRef roleURI="http://hcsgcorp.com/role/IncomeTaxesDetails" xlink:type="simple" xlink:href="hcsg-20190331.xsd#IncomeTaxesDetails"/>
  <link:calculationLink xlink:role="http://hcsgcorp.com/role/IncomeTaxesDetails" xlink:type="extended"/>
  <link:roleRef roleURI="http://hcsgcorp.com/role/SegmentInformation" xlink:type="simple" xlink:href="hcsg-20190331.xsd#SegmentInformation"/>
  <link:calculationLink xlink:role="http://hcsgcorp.com/role/SegmentInformation" xlink:type="extended"/>
  <link:roleRef roleURI="http://hcsgcorp.com/role/SegmentInformationTables" xlink:type="simple" xlink:href="hcsg-20190331.xsd#SegmentInformationTables"/>
  <link:calculationLink xlink:role="http://hcsgcorp.com/role/SegmentInformationTables" xlink:type="extended"/>
  <link:roleRef roleURI="http://hcsgcorp.com/role/SegmentInformationScheduleofInformationofReportableSegmentsDetails" xlink:type="simple" xlink:href="hcsg-20190331.xsd#SegmentInformationScheduleofInformationofReportableSegmentsDetails"/>
  <link:calculationLink xlink:role="http://hcsgcorp.com/role/SegmentInformationScheduleofInformationofReportableSegmentsDetails" xlink:type="extended"/>
  <link:roleRef roleURI="http://hcsgcorp.com/role/EarningsPerCommonShare" xlink:type="simple" xlink:href="hcsg-20190331.xsd#EarningsPerCommonShare"/>
  <link:calculationLink xlink:role="http://hcsgcorp.com/role/EarningsPerCommonShare" xlink:type="extended"/>
  <link:roleRef roleURI="http://hcsgcorp.com/role/EarningsPerCommonShareTables" xlink:type="simple" xlink:href="hcsg-20190331.xsd#EarningsPerCommonShareTables"/>
  <link:calculationLink xlink:role="http://hcsgcorp.com/role/EarningsPerCommonShareTables" xlink:type="extended"/>
  <link:roleRef roleURI="http://hcsgcorp.com/role/EarningsPerCommonShareComputationofBasicandDilutedNetEarningsPerShareDetails" xlink:type="simple" xlink:href="hcsg-20190331.xsd#EarningsPerCommonShareComputationofBasicandDilutedNetEarningsPerShareDetails"/>
  <link:calculationLink xlink:role="http://hcsgcorp.com/role/EarningsPerCommonShareComputationofBasicandDilutedNetEarningsPerShareDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding_800d6839-6a5c-4974-9b83-b365c5253336" xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_WeightedAverageNumberOfSharesOutstandingBasic_dcf29d23-cce7-49ca-89a5-0aeb45acff6d" xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.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_800d6839-6a5c-4974-9b83-b365c5253336" xlink:to="loc_us-gaap_WeightedAverageNumberOfSharesOutstandingBasic_dcf29d23-cce7-49ca-89a5-0aeb45acff6d" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_WeightedAverageNumberDilutedSharesOutstandingAdjustment_b99f3fa7-11b0-4c61-ba38-753429977a0a" xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_WeightedAverageNumberDilutedSharesOutstandingAdjustment"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding_800d6839-6a5c-4974-9b83-b365c5253336" xlink:to="loc_us-gaap_WeightedAverageNumberDilutedSharesOutstandingAdjustment_b99f3fa7-11b0-4c61-ba38-753429977a0a" xlink:type="arc"/>
  </link:calculationLink>
  <link:roleRef roleURI="http://hcsgcorp.com/role/EarningsPerCommonShareAdditionalInformationDetails" xlink:type="simple" xlink:href="hcsg-20190331.xsd#EarningsPerCommonShareAdditionalInformationDetails"/>
  <link:calculationLink xlink:role="http://hcsgcorp.com/role/EarningsPerCommonShareAdditionalInformationDetails" xlink:type="extended"/>
  <link:roleRef roleURI="http://hcsgcorp.com/role/OtherContingencies" xlink:type="simple" xlink:href="hcsg-20190331.xsd#OtherContingencies"/>
  <link:calculationLink xlink:role="http://hcsgcorp.com/role/OtherContingencies" xlink:type="extended"/>
  <link:roleRef roleURI="http://hcsgcorp.com/role/OtherContingenciesDetails" xlink:type="simple" xlink:href="hcsg-20190331.xsd#OtherContingenciesDetails"/>
  <link:calculationLink xlink:role="http://hcsgcorp.com/role/OtherContingenciesDetails" xlink:type="extended"/>
  <link:roleRef roleURI="http://hcsgcorp.com/role/SubsequentEvents" xlink:type="simple" xlink:href="hcsg-20190331.xsd#SubsequentEvents"/>
  <link:calculationLink xlink:role="http://hcsgcorp.com/role/SubsequentEvents" xlink:type="extended"/>
</link:linkbase>
