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

<!--XBRL Document Created with the Workiva Platform-->
<!--Copyright 2024 Workiva-->
<!--r:166fd479-74ee-4ffa-970f-f265d716edda,g:0301580b-9c4d-4f4a-b358-26dedb6b91cd-->
<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.westlake.com/role/ConsolidatedBalanceSheetsUnaudited" xlink:type="simple" xlink:href="wlk-20240630.xsd#ConsolidatedBalanceSheetsUnaudited"/>
  <link:calculationLink xlink:role="http://www.westlake.com/role/ConsolidatedBalanceSheetsUnaudited" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LiabilitiesAndStockholdersEquity_d70ed96d-2e3f-4fc1-9a04-8c7a358cc49e" 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_CommitmentsAndContingencies_ec8ac188-de99-49a4-93c5-b0a6955f5663" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_CommitmentsAndContingencies"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_LiabilitiesAndStockholdersEquity_d70ed96d-2e3f-4fc1-9a04-8c7a358cc49e" xlink:to="loc_us-gaap_CommitmentsAndContingencies_ec8ac188-de99-49a4-93c5-b0a6955f5663" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_Liabilities_15959a17-3464-4a00-bde9-8635ee5f8d02" 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_d70ed96d-2e3f-4fc1-9a04-8c7a358cc49e" xlink:to="loc_us-gaap_Liabilities_15959a17-3464-4a00-bde9-8635ee5f8d02" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest_b4458453-5ecb-4c2b-84ab-2ba68cbd8bab" 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_d70ed96d-2e3f-4fc1-9a04-8c7a358cc49e" xlink:to="loc_us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest_b4458453-5ecb-4c2b-84ab-2ba68cbd8bab" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockholdersEquity_55669b22-d1ca-4921-80ca-28c3bd98c5b6" 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_PreferredStockValue_0c585225-3ebd-4ab5-a528-b966aae0c8a7" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_PreferredStockValue"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_StockholdersEquity_55669b22-d1ca-4921-80ca-28c3bd98c5b6" xlink:to="loc_us-gaap_PreferredStockValue_0c585225-3ebd-4ab5-a528-b966aae0c8a7" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonStockValue_7ad68514-5c09-403c-aaf8-b5c297c397df" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_CommonStockValue"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_StockholdersEquity_55669b22-d1ca-4921-80ca-28c3bd98c5b6" xlink:to="loc_us-gaap_CommonStockValue_7ad68514-5c09-403c-aaf8-b5c297c397df" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TreasuryStockValue_604a41aa-1f1f-4f20-9afa-1d380a3f981a" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_TreasuryStockValue"/>
    <link:calculationArc order="3" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_StockholdersEquity_55669b22-d1ca-4921-80ca-28c3bd98c5b6" xlink:to="loc_us-gaap_TreasuryStockValue_604a41aa-1f1f-4f20-9afa-1d380a3f981a" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AdditionalPaidInCapitalCommonStock_71438cb8-fe09-41fb-8447-3959ddb248ef" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_AdditionalPaidInCapitalCommonStock"/>
    <link:calculationArc order="4" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_StockholdersEquity_55669b22-d1ca-4921-80ca-28c3bd98c5b6" xlink:to="loc_us-gaap_AdditionalPaidInCapitalCommonStock_71438cb8-fe09-41fb-8447-3959ddb248ef" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RetainedEarningsAccumulatedDeficit_0a1b4889-e8d6-48e6-a6b5-3511f477e054" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_RetainedEarningsAccumulatedDeficit"/>
    <link:calculationArc order="5" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_StockholdersEquity_55669b22-d1ca-4921-80ca-28c3bd98c5b6" xlink:to="loc_us-gaap_RetainedEarningsAccumulatedDeficit_0a1b4889-e8d6-48e6-a6b5-3511f477e054" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax_1ab9518e-3ac7-40b3-9cdf-c43941d0f357" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax"/>
    <link:calculationArc order="6" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_StockholdersEquity_55669b22-d1ca-4921-80ca-28c3bd98c5b6" xlink:to="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax_1ab9518e-3ac7-40b3-9cdf-c43941d0f357" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_Assets_e64315b3-c613-432d-8473-cfc7df4a16e6" 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_AssetsCurrent_f4352516-f34a-4097-ab5e-4ef62dbdc54e" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.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_e64315b3-c613-432d-8473-cfc7df4a16e6" xlink:to="loc_us-gaap_AssetsCurrent_f4352516-f34a-4097-ab5e-4ef62dbdc54e" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentNet_64a0bb7a-e3a8-4697-a774-696fbecfe6a3" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.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_e64315b3-c613-432d-8473-cfc7df4a16e6" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentNet_64a0bb7a-e3a8-4697-a774-696fbecfe6a3" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingLeaseRightOfUseAsset_9e576703-f3b3-40c8-aeae-7ac6225e05d4" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.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_Assets_e64315b3-c613-432d-8473-cfc7df4a16e6" xlink:to="loc_us-gaap_OperatingLeaseRightOfUseAsset_9e576703-f3b3-40c8-aeae-7ac6225e05d4" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_Goodwill_89255256-a1a2-4c68-a38f-32335ef09348" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_Goodwill"/>
    <link:calculationArc order="4" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_Assets_e64315b3-c613-432d-8473-cfc7df4a16e6" xlink:to="loc_us-gaap_Goodwill_89255256-a1a2-4c68-a38f-32335ef09348" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsNet_049bdc62-87d3-4df9-a8e5-86aad8e4e933" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_FiniteLivedIntangibleAssetsNet"/>
    <link:calculationArc order="5" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_Assets_e64315b3-c613-432d-8473-cfc7df4a16e6" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsNet_049bdc62-87d3-4df9-a8e5-86aad8e4e933" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherIntangibleAssetsNet_717dc401-05e5-4293-853d-e26521498651" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_OtherIntangibleAssetsNet"/>
    <link:calculationArc order="6" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_Assets_e64315b3-c613-432d-8473-cfc7df4a16e6" xlink:to="loc_us-gaap_OtherIntangibleAssetsNet_717dc401-05e5-4293-853d-e26521498651" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EquityMethodInvestments_ad864f2c-ab5d-40f2-815d-f085b7b18c81" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_EquityMethodInvestments"/>
    <link:calculationArc order="7" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_Assets_e64315b3-c613-432d-8473-cfc7df4a16e6" xlink:to="loc_us-gaap_EquityMethodInvestments_ad864f2c-ab5d-40f2-815d-f085b7b18c81" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredCostsAndOtherAssets_7a678176-98b3-4e71-8c17-5a8e6f6c272b" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DeferredCostsAndOtherAssets"/>
    <link:calculationArc order="8" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_Assets_e64315b3-c613-432d-8473-cfc7df4a16e6" xlink:to="loc_us-gaap_DeferredCostsAndOtherAssets_7a678176-98b3-4e71-8c17-5a8e6f6c272b" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest_5c3d560a-b61b-47ef-92cd-6785ef8d56fe" 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_StockholdersEquity_ba20518d-1408-4824-87a1-8a8ddb880a61" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_StockholdersEquity"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest_5c3d560a-b61b-47ef-92cd-6785ef8d56fe" xlink:to="loc_us-gaap_StockholdersEquity_ba20518d-1408-4824-87a1-8a8ddb880a61" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_MinorityInterest_974c93f1-374c-4932-a1d1-29e3d35e9272" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_MinorityInterest"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest_5c3d560a-b61b-47ef-92cd-6785ef8d56fe" xlink:to="loc_us-gaap_MinorityInterest_974c93f1-374c-4932-a1d1-29e3d35e9272" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_Liabilities_fe893b4b-0b5b-4dbb-b652-86cca65585ae" 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_LiabilitiesCurrent_2c9d3dbb-d385-4bc5-b56e-bce999a438c4" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.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_Liabilities_fe893b4b-0b5b-4dbb-b652-86cca65585ae" xlink:to="loc_us-gaap_LiabilitiesCurrent_2c9d3dbb-d385-4bc5-b56e-bce999a438c4" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongTermDebtNoncurrent_46c213bd-9916-4d79-b02c-569f4606a2bb" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_LongTermDebtNoncurrent"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_Liabilities_fe893b4b-0b5b-4dbb-b652-86cca65585ae" xlink:to="loc_us-gaap_LongTermDebtNoncurrent_46c213bd-9916-4d79-b02c-569f4606a2bb" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredIncomeTaxLiabilitiesNet_1e518812-aa7b-483f-a3d9-aa689b2c5932" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DeferredIncomeTaxLiabilitiesNet"/>
    <link:calculationArc order="3" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_Liabilities_fe893b4b-0b5b-4dbb-b652-86cca65585ae" xlink:to="loc_us-gaap_DeferredIncomeTaxLiabilitiesNet_1e518812-aa7b-483f-a3d9-aa689b2c5932" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesNoncurrent_638afdbe-b1ac-45af-9073-486631b506bd" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesNoncurrent"/>
    <link:calculationArc order="4" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_Liabilities_fe893b4b-0b5b-4dbb-b652-86cca65585ae" xlink:to="loc_us-gaap_PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesNoncurrent_638afdbe-b1ac-45af-9073-486631b506bd" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingLeaseLiabilityNoncurrent_04399945-3fd0-49d7-9aaa-bf24abe647cc" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_OperatingLeaseLiabilityNoncurrent"/>
    <link:calculationArc order="5" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_Liabilities_fe893b4b-0b5b-4dbb-b652-86cca65585ae" xlink:to="loc_us-gaap_OperatingLeaseLiabilityNoncurrent_04399945-3fd0-49d7-9aaa-bf24abe647cc" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherLiabilitiesNoncurrent_6be825b5-de55-450d-8ed4-9c5f3938db0e" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_OtherLiabilitiesNoncurrent"/>
    <link:calculationArc order="6" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_Liabilities_fe893b4b-0b5b-4dbb-b652-86cca65585ae" xlink:to="loc_us-gaap_OtherLiabilitiesNoncurrent_6be825b5-de55-450d-8ed4-9c5f3938db0e" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LiabilitiesCurrent_7387eafb-7506-42ae-81a3-230dae3b1f3d" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_LiabilitiesCurrent"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccountsPayableCurrent_67651741-7e91-4d8d-8adb-ea1010d56c74" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.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_7387eafb-7506-42ae-81a3-230dae3b1f3d" xlink:to="loc_us-gaap_AccountsPayableCurrent_67651741-7e91-4d8d-8adb-ea1010d56c74" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccruedLiabilitiesCurrent_2ef50624-fd0c-49a2-916c-68490c874030" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_AccruedLiabilitiesCurrent"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_LiabilitiesCurrent_7387eafb-7506-42ae-81a3-230dae3b1f3d" xlink:to="loc_us-gaap_AccruedLiabilitiesCurrent_2ef50624-fd0c-49a2-916c-68490c874030" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongTermDebtCurrent_4425ca05-0e4b-4227-8338-003d1a3e2e0a" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_LongTermDebtCurrent"/>
    <link:calculationArc order="3" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_LiabilitiesCurrent_7387eafb-7506-42ae-81a3-230dae3b1f3d" xlink:to="loc_us-gaap_LongTermDebtCurrent_4425ca05-0e4b-4227-8338-003d1a3e2e0a" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AssetsCurrent_eb515666-6bba-4d23-9f50-e81baf123873" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_AssetsCurrent"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CashAndCashEquivalentsAtCarryingValue_36295c3c-2cba-4571-babc-67ca0de5c976" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_CashAndCashEquivalentsAtCarryingValue"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_AssetsCurrent_eb515666-6bba-4d23-9f50-e81baf123873" xlink:to="loc_us-gaap_CashAndCashEquivalentsAtCarryingValue_36295c3c-2cba-4571-babc-67ca0de5c976" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ReceivablesNetCurrent_43bf8a77-27d6-46f4-aa78-fc3cbfd55afd" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ReceivablesNetCurrent"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_AssetsCurrent_eb515666-6bba-4d23-9f50-e81baf123873" xlink:to="loc_us-gaap_ReceivablesNetCurrent_43bf8a77-27d6-46f4-aa78-fc3cbfd55afd" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InventoryNet_a2ede5c4-03e5-45ff-bd8b-c13a602e5868" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_InventoryNet"/>
    <link:calculationArc order="3" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_AssetsCurrent_eb515666-6bba-4d23-9f50-e81baf123873" xlink:to="loc_us-gaap_InventoryNet_a2ede5c4-03e5-45ff-bd8b-c13a602e5868" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PrepaidExpenseAndOtherAssetsCurrent_1c64a7f8-ae24-40b9-bbfe-670102c62c28" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_PrepaidExpenseAndOtherAssetsCurrent"/>
    <link:calculationArc order="4" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_AssetsCurrent_eb515666-6bba-4d23-9f50-e81baf123873" xlink:to="loc_us-gaap_PrepaidExpenseAndOtherAssetsCurrent_1c64a7f8-ae24-40b9-bbfe-670102c62c28" xlink:type="arc"/>
  </link:calculationLink>
  <link:roleRef roleURI="http://www.westlake.com/role/ConsolidatedStatementsofOperationsUnaudited" xlink:type="simple" xlink:href="wlk-20240630.xsd#ConsolidatedStatementsofOperationsUnaudited"/>
  <link:calculationLink xlink:role="http://www.westlake.com/role/ConsolidatedStatementsofOperationsUnaudited" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_GrossProfit_3cfce934-f332-4ea3-8a5d-9ad6d71fd8ee" 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_f16e44f0-6102-4b1f-8302-2744857db756" 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_3cfce934-f332-4ea3-8a5d-9ad6d71fd8ee" xlink:to="loc_us-gaap_Revenues_f16e44f0-6102-4b1f-8302-2744857db756" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CostOfGoodsAndServicesSold_f5d428e2-0fcf-4011-a414-0a45fe3c884b" 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_3cfce934-f332-4ea3-8a5d-9ad6d71fd8ee" xlink:to="loc_us-gaap_CostOfGoodsAndServicesSold_f5d428e2-0fcf-4011-a414-0a45fe3c884b" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetIncomeLoss_e55c4ffd-7fc2-45c6-8874-2a7006cc3a94" 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_ProfitLoss_ec91d220-8383-4593-84c9-3fa31512bd70" 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_NetIncomeLoss_e55c4ffd-7fc2-45c6-8874-2a7006cc3a94" xlink:to="loc_us-gaap_ProfitLoss_ec91d220-8383-4593-84c9-3fa31512bd70" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetIncomeLossAttributableToNoncontrollingInterest_233b0b53-b4e6-4354-ae3f-86c50479eb4b" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_NetIncomeLossAttributableToNoncontrollingInterest"/>
    <link:calculationArc order="2" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetIncomeLoss_e55c4ffd-7fc2-45c6-8874-2a7006cc3a94" xlink:to="loc_us-gaap_NetIncomeLossAttributableToNoncontrollingInterest_233b0b53-b4e6-4354-ae3f-86c50479eb4b" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest_2dd03c20-f9ee-49a0-a196-1322e26ee2ba" 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_OperatingIncomeLoss_ba908eee-71dc-4582-b1b2-49950259ddef" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_OperatingIncomeLoss"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest_2dd03c20-f9ee-49a0-a196-1322e26ee2ba" xlink:to="loc_us-gaap_OperatingIncomeLoss_ba908eee-71dc-4582-b1b2-49950259ddef" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InterestExpense_a82871f1-c122-459b-85ea-290508ba9983" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_InterestExpense"/>
    <link:calculationArc order="2" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest_2dd03c20-f9ee-49a0-a196-1322e26ee2ba" xlink:to="loc_us-gaap_InterestExpense_a82871f1-c122-459b-85ea-290508ba9983" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NonoperatingIncomeExpense_aa553c8d-3df7-4254-aded-47bb694bb052" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_NonoperatingIncomeExpense"/>
    <link:calculationArc order="3" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest_2dd03c20-f9ee-49a0-a196-1322e26ee2ba" xlink:to="loc_us-gaap_NonoperatingIncomeExpense_aa553c8d-3df7-4254-aded-47bb694bb052" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingIncomeLoss_8442661b-eac0-4cfa-a68e-a2be461b5712" 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_GrossProfit_0601e622-7ed3-4878-89dc-095884d5cf6f" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_GrossProfit"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_OperatingIncomeLoss_8442661b-eac0-4cfa-a68e-a2be461b5712" xlink:to="loc_us-gaap_GrossProfit_0601e622-7ed3-4878-89dc-095884d5cf6f" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SellingGeneralAndAdministrativeExpense_260e63b8-92fe-49a7-b15f-af0558fde298" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_SellingGeneralAndAdministrativeExpense"/>
    <link:calculationArc order="2" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_OperatingIncomeLoss_8442661b-eac0-4cfa-a68e-a2be461b5712" xlink:to="loc_us-gaap_SellingGeneralAndAdministrativeExpense_260e63b8-92fe-49a7-b15f-af0558fde298" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AmortizationOfIntangibleAssets_71f8b1fe-cb61-4ab0-8724-328e81bee04c" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_AmortizationOfIntangibleAssets"/>
    <link:calculationArc order="3" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_OperatingIncomeLoss_8442661b-eac0-4cfa-a68e-a2be461b5712" xlink:to="loc_us-gaap_AmortizationOfIntangibleAssets_71f8b1fe-cb61-4ab0-8724-328e81bee04c" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_wlk_RestructuringTransactionandIntegrationCost_b41b4fda-76b2-454e-b0e1-cc2a040c70af" xlink:href="wlk-20240630.xsd#wlk_RestructuringTransactionandIntegrationCost"/>
    <link:calculationArc order="4" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_OperatingIncomeLoss_8442661b-eac0-4cfa-a68e-a2be461b5712" xlink:to="loc_wlk_RestructuringTransactionandIntegrationCost_b41b4fda-76b2-454e-b0e1-cc2a040c70af" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ProfitLoss_28e95710-55e3-4dd5-b4f2-6137000ea0f3" 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_4b30ed98-8ecc-44ea-ad00-b3db4ad3b092" 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_28e95710-55e3-4dd5-b4f2-6137000ea0f3" xlink:to="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest_4b30ed98-8ecc-44ea-ad00-b3db4ad3b092" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeTaxExpenseBenefit_ae882370-0b71-4a73-9d95-baee2c548442" 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_28e95710-55e3-4dd5-b4f2-6137000ea0f3" xlink:to="loc_us-gaap_IncomeTaxExpenseBenefit_ae882370-0b71-4a73-9d95-baee2c548442" xlink:type="arc"/>
  </link:calculationLink>
  <link:roleRef roleURI="http://www.westlake.com/role/ConsolidatedStatementsofComprehensiveIncomeUnaudited" xlink:type="simple" xlink:href="wlk-20240630.xsd#ConsolidatedStatementsofComprehensiveIncomeUnaudited"/>
  <link:calculationLink xlink:role="http://www.westlake.com/role/ConsolidatedStatementsofComprehensiveIncomeUnaudited" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest_56cc5705-a9f3-41de-97c9-207faac70904" 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_OtherComprehensiveIncomeLossNetOfTax_666b3303-a3c2-4bb2-93a5-c5ca414c8f02" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_OtherComprehensiveIncomeLossNetOfTax"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest_56cc5705-a9f3-41de-97c9-207faac70904" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLossNetOfTax_666b3303-a3c2-4bb2-93a5-c5ca414c8f02" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ProfitLoss_b4985f69-8590-4670-add5-11b6461e055a" 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_ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest_56cc5705-a9f3-41de-97c9-207faac70904" xlink:to="loc_us-gaap_ProfitLoss_b4985f69-8590-4670-add5-11b6461e055a" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossNetOfTax_c7373f12-1f1f-4739-a34e-60513f1752fa" 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_OtherComprehensiveIncomeOtherNetOfTax_31646d46-5b90-4810-8f53-0a022522df76" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_OtherComprehensiveIncomeOtherNetOfTax"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_OtherComprehensiveIncomeLossNetOfTax_c7373f12-1f1f-4739-a34e-60513f1752fa" xlink:to="loc_us-gaap_OtherComprehensiveIncomeOtherNetOfTax_31646d46-5b90-4810-8f53-0a022522df76" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansTax_7d9a991d-1afa-4fc4-9582-43fa5b3cc1de" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansTax"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_OtherComprehensiveIncomeLossNetOfTax_c7373f12-1f1f-4739-a34e-60513f1752fa" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansTax_7d9a991d-1afa-4fc4-9582-43fa5b3cc1de" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossForeignCurrencyTranslationAdjustmentTax_38437160-1112-4e6d-a96e-a01813dbd6c9" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_OtherComprehensiveIncomeLossForeignCurrencyTranslationAdjustmentTax"/>
    <link:calculationArc order="3" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_OtherComprehensiveIncomeLossNetOfTax_c7373f12-1f1f-4739-a34e-60513f1752fa" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLossForeignCurrencyTranslationAdjustmentTax_38437160-1112-4e6d-a96e-a01813dbd6c9" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentBeforeTax_d7e8cd2f-54a8-4189-92e3-561f9a0f3f95" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentBeforeTax"/>
    <link:calculationArc order="4" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_OtherComprehensiveIncomeLossNetOfTax_c7373f12-1f1f-4739-a34e-60513f1752fa" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentBeforeTax_d7e8cd2f-54a8-4189-92e3-561f9a0f3f95" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentBeforeTax_54a1e207-ae03-4e0f-9019-985e9022de26" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentBeforeTax"/>
    <link:calculationArc order="5" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_OtherComprehensiveIncomeLossNetOfTax_c7373f12-1f1f-4739-a34e-60513f1752fa" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentBeforeTax_54a1e207-ae03-4e0f-9019-985e9022de26" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ComprehensiveIncomeNetOfTax_3d4e999d-c756-46df-b2fe-6b8ae6fa1a8a" 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_eca072c0-3551-4c04-be86-9ecca08ed2fa" 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_3d4e999d-c756-46df-b2fe-6b8ae6fa1a8a" xlink:to="loc_us-gaap_ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest_eca072c0-3551-4c04-be86-9ecca08ed2fa" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest_9f477ee4-2581-4c6a-8dfa-fa59011689d6" 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_3d4e999d-c756-46df-b2fe-6b8ae6fa1a8a" xlink:to="loc_us-gaap_ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest_9f477ee4-2581-4c6a-8dfa-fa59011689d6" xlink:type="arc"/>
  </link:calculationLink>
  <link:roleRef roleURI="http://www.westlake.com/role/ConsolidatedStatementsofCashFlowsUnaudited" xlink:type="simple" xlink:href="wlk-20240630.xsd#ConsolidatedStatementsofCashFlowsUnaudited"/>
  <link:calculationLink xlink:role="http://www.westlake.com/role/ConsolidatedStatementsofCashFlowsUnaudited" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetCashProvidedByUsedInInvestingActivities_d639e736-a67b-4cf5-bba7-d638ac5e0a05" 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_PaymentsForProceedsFromOtherInvestingActivities_05f8d420-5b71-45ea-aa6f-6ea3a4784c90" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_PaymentsForProceedsFromOtherInvestingActivities"/>
    <link:calculationArc order="1" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInInvestingActivities_d639e736-a67b-4cf5-bba7-d638ac5e0a05" xlink:to="loc_us-gaap_PaymentsForProceedsFromOtherInvestingActivities_05f8d420-5b71-45ea-aa6f-6ea3a4784c90" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PaymentsToAcquirePropertyPlantAndEquipment_13389aac-a9c7-4d23-91f4-dc337dedffe7" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.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_d639e736-a67b-4cf5-bba7-d638ac5e0a05" xlink:to="loc_us-gaap_PaymentsToAcquirePropertyPlantAndEquipment_13389aac-a9c7-4d23-91f4-dc337dedffe7" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_wlk_ReturnOfAdditionsToInvestmentFromUnconsolidatedSubsidiaries_89579e5f-3887-48b0-8c1d-aeb76f5975ab" xlink:href="wlk-20240630.xsd#wlk_ReturnOfAdditionsToInvestmentFromUnconsolidatedSubsidiaries"/>
    <link:calculationArc order="3" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInInvestingActivities_d639e736-a67b-4cf5-bba7-d638ac5e0a05" xlink:to="loc_wlk_ReturnOfAdditionsToInvestmentFromUnconsolidatedSubsidiaries_89579e5f-3887-48b0-8c1d-aeb76f5975ab" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetCashProvidedByUsedInFinancingActivities_dd54dc5e-edbd-47ea-9daf-6b50e3030f2d" 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_us-gaap_ProceedsFromPaymentsForOtherFinancingActivities_326da52c-d542-4c01-863f-1a0f2a968ddf" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ProceedsFromPaymentsForOtherFinancingActivities"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivities_dd54dc5e-edbd-47ea-9daf-6b50e3030f2d" xlink:to="loc_us-gaap_ProceedsFromPaymentsForOtherFinancingActivities_326da52c-d542-4c01-863f-1a0f2a968ddf" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PaymentsOfDividendsMinorityInterest_58009cdc-4829-44c9-9f77-0ca83865867d" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_PaymentsOfDividendsMinorityInterest"/>
    <link:calculationArc order="2" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivities_dd54dc5e-edbd-47ea-9daf-6b50e3030f2d" xlink:to="loc_us-gaap_PaymentsOfDividendsMinorityInterest_58009cdc-4829-44c9-9f77-0ca83865867d" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PaymentsForRepurchaseOfCommonStock_e0e090ed-721a-47e2-8e47-cbc0d68fa81a" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_PaymentsForRepurchaseOfCommonStock"/>
    <link:calculationArc order="3" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivities_dd54dc5e-edbd-47ea-9daf-6b50e3030f2d" xlink:to="loc_us-gaap_PaymentsForRepurchaseOfCommonStock_e0e090ed-721a-47e2-8e47-cbc0d68fa81a" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PaymentsOfDividendsCommonStock_1d84f166-8f5c-4aac-8fa3-ef6ad66a5c22" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_PaymentsOfDividendsCommonStock"/>
    <link:calculationArc order="4" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivities_dd54dc5e-edbd-47ea-9daf-6b50e3030f2d" xlink:to="loc_us-gaap_PaymentsOfDividendsCommonStock_1d84f166-8f5c-4aac-8fa3-ef6ad66a5c22" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ProceedsFromStockOptionsExercised_6f22d0a9-696b-4ad1-827b-cf6ed3278752" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ProceedsFromStockOptionsExercised"/>
    <link:calculationArc order="5" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivities_dd54dc5e-edbd-47ea-9daf-6b50e3030f2d" xlink:to="loc_us-gaap_ProceedsFromStockOptionsExercised_6f22d0a9-696b-4ad1-827b-cf6ed3278752" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect_4625baa3-2bd1-4986-893d-ec5e2603b54f" 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_104989a2-5706-4aca-b808-57ec0cf49543" 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_4625baa3-2bd1-4986-893d-ec5e2603b54f" xlink:to="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_104989a2-5706-4aca-b808-57ec0cf49543" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetCashProvidedByUsedInInvestingActivities_5ec7cd59-0ac5-4ec3-ba29-726726f11252" 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_4625baa3-2bd1-4986-893d-ec5e2603b54f" xlink:to="loc_us-gaap_NetCashProvidedByUsedInInvestingActivities_5ec7cd59-0ac5-4ec3-ba29-726726f11252" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetCashProvidedByUsedInFinancingActivities_6c139a35-06cb-4576-bed8-0b27d7872f1f" 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_4625baa3-2bd1-4986-893d-ec5e2603b54f" xlink:to="loc_us-gaap_NetCashProvidedByUsedInFinancingActivities_6c139a35-06cb-4576-bed8-0b27d7872f1f" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EffectOfExchangeRateOnCashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents_b4e63aff-a047-4e46-9c20-036b7b504ab2" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_EffectOfExchangeRateOnCashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents"/>
    <link:calculationArc order="4" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect_4625baa3-2bd1-4986-893d-ec5e2603b54f" xlink:to="loc_us-gaap_EffectOfExchangeRateOnCashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents_b4e63aff-a047-4e46-9c20-036b7b504ab2" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_1d38beac-6953-4f10-bc4d-b6692475c922" 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_us-gaap_ProfitLoss_3d7f707c-45a3-4638-9d3f-b2952f480281" 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_NetCashProvidedByUsedInOperatingActivities_1d38beac-6953-4f10-bc4d-b6692475c922" xlink:to="loc_us-gaap_ProfitLoss_3d7f707c-45a3-4638-9d3f-b2952f480281" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DepreciationDepletionAndAmortization_afaf68dc-9e80-469b-aa00-992a4d8c704c" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.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_1d38beac-6953-4f10-bc4d-b6692475c922" xlink:to="loc_us-gaap_DepreciationDepletionAndAmortization_afaf68dc-9e80-469b-aa00-992a4d8c704c" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensation_3036ead5-efbd-4406-9860-74e6b20e4590" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ShareBasedCompensation"/>
    <link:calculationArc order="3" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_1d38beac-6953-4f10-bc4d-b6692475c922" xlink:to="loc_us-gaap_ShareBasedCompensation_3036ead5-efbd-4406-9860-74e6b20e4590" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_GainLossOnDispositionOfAssets_e52fee2d-7371-4007-857f-696df9394aa3" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_GainLossOnDispositionOfAssets"/>
    <link:calculationArc order="4" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_1d38beac-6953-4f10-bc4d-b6692475c922" xlink:to="loc_us-gaap_GainLossOnDispositionOfAssets_e52fee2d-7371-4007-857f-696df9394aa3" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredIncomeTaxExpenseBenefit_eb3e1b43-d1f0-4e4b-bc18-854501b4e3b7" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DeferredIncomeTaxExpenseBenefit"/>
    <link:calculationArc order="5" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_1d38beac-6953-4f10-bc4d-b6692475c922" xlink:to="loc_us-gaap_DeferredIncomeTaxExpenseBenefit_eb3e1b43-d1f0-4e4b-bc18-854501b4e3b7" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherOperatingActivitiesCashFlowStatement_47143d11-712a-403e-8be7-15bb433e6de3" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_OtherOperatingActivitiesCashFlowStatement"/>
    <link:calculationArc order="6" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_1d38beac-6953-4f10-bc4d-b6692475c922" xlink:to="loc_us-gaap_OtherOperatingActivitiesCashFlowStatement_47143d11-712a-403e-8be7-15bb433e6de3" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncreaseDecreaseInAccountsAndOtherReceivables_a4306408-36a9-404f-bee2-b1def7b519d1" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_IncreaseDecreaseInAccountsAndOtherReceivables"/>
    <link:calculationArc order="7" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_1d38beac-6953-4f10-bc4d-b6692475c922" xlink:to="loc_us-gaap_IncreaseDecreaseInAccountsAndOtherReceivables_a4306408-36a9-404f-bee2-b1def7b519d1" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncreaseDecreaseInInventories_00534273-332c-475a-8246-93b9793d2ed1" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.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_1d38beac-6953-4f10-bc4d-b6692475c922" xlink:to="loc_us-gaap_IncreaseDecreaseInInventories_00534273-332c-475a-8246-93b9793d2ed1" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets_b9fdc44e-8b8e-48a5-94d3-4ae0e75b4b9e" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.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_1d38beac-6953-4f10-bc4d-b6692475c922" xlink:to="loc_us-gaap_IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets_b9fdc44e-8b8e-48a5-94d3-4ae0e75b4b9e" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncreaseDecreaseInAccountsPayable_c3e5364a-9770-4cfd-aa25-35a835ed97d4" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_IncreaseDecreaseInAccountsPayable"/>
    <link:calculationArc order="10" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_1d38beac-6953-4f10-bc4d-b6692475c922" xlink:to="loc_us-gaap_IncreaseDecreaseInAccountsPayable_c3e5364a-9770-4cfd-aa25-35a835ed97d4" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncreaseDecreaseInAccruedLiabilities_eff96fad-656a-4246-9f99-96456ab3b916" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_IncreaseDecreaseInAccruedLiabilities"/>
    <link:calculationArc order="11" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_1d38beac-6953-4f10-bc4d-b6692475c922" xlink:to="loc_us-gaap_IncreaseDecreaseInAccruedLiabilities_eff96fad-656a-4246-9f99-96456ab3b916" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncreaseDecreaseInOtherOperatingCapitalNet_36a5286c-b4c0-41b0-9db2-277e3c93b0e6" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_IncreaseDecreaseInOtherOperatingCapitalNet"/>
    <link:calculationArc order="12" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_1d38beac-6953-4f10-bc4d-b6692475c922" xlink:to="loc_us-gaap_IncreaseDecreaseInOtherOperatingCapitalNet_36a5286c-b4c0-41b0-9db2-277e3c93b0e6" xlink:type="arc"/>
  </link:calculationLink>
  <link:roleRef roleURI="http://www.westlake.com/role/AccountsReceivableDetails" xlink:type="simple" xlink:href="wlk-20240630.xsd#AccountsReceivableDetails"/>
  <link:calculationLink xlink:role="http://www.westlake.com/role/AccountsReceivableDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccountsReceivableNetCurrent_c139ea8a-bba6-4766-8f45-a063ab4dd330" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_AccountsReceivableNetCurrent"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccountsReceivableGrossCurrent_d21dfec0-4d69-4215-b2cf-c243ead43494" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_AccountsReceivableGrossCurrent"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_AccountsReceivableNetCurrent_c139ea8a-bba6-4766-8f45-a063ab4dd330" xlink:to="loc_us-gaap_AccountsReceivableGrossCurrent_d21dfec0-4d69-4215-b2cf-c243ead43494" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AllowanceForDoubtfulAccountsReceivableCurrent_ddc887e3-4655-43f7-bcd9-afd92bce583b" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.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_AccountsReceivableNetCurrent_c139ea8a-bba6-4766-8f45-a063ab4dd330" xlink:to="loc_us-gaap_AllowanceForDoubtfulAccountsReceivableCurrent_ddc887e3-4655-43f7-bcd9-afd92bce583b" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ReceivablesNetCurrent_6a899117-33a2-4ac3-b6ad-eee8d4f26c5e" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ReceivablesNetCurrent"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccountsReceivableNetCurrent_0c8d70ff-ec6e-4572-8255-2ff20e543500" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_AccountsReceivableNetCurrent"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_ReceivablesNetCurrent_6a899117-33a2-4ac3-b6ad-eee8d4f26c5e" xlink:to="loc_us-gaap_AccountsReceivableNetCurrent_0c8d70ff-ec6e-4572-8255-2ff20e543500" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeTaxesReceivable_443fb18e-fcf7-4e42-bb9c-e2a73516c77c" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_IncomeTaxesReceivable"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_ReceivablesNetCurrent_6a899117-33a2-4ac3-b6ad-eee8d4f26c5e" xlink:to="loc_us-gaap_IncomeTaxesReceivable_443fb18e-fcf7-4e42-bb9c-e2a73516c77c" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherReceivablesNetCurrent_4a1ae680-6bf7-4dbe-8c27-77127af66a2b" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_OtherReceivablesNetCurrent"/>
    <link:calculationArc order="3" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_ReceivablesNetCurrent_6a899117-33a2-4ac3-b6ad-eee8d4f26c5e" xlink:to="loc_us-gaap_OtherReceivablesNetCurrent_4a1ae680-6bf7-4dbe-8c27-77127af66a2b" xlink:type="arc"/>
  </link:calculationLink>
  <link:roleRef roleURI="http://www.westlake.com/role/InventoriesDetails" xlink:type="simple" xlink:href="wlk-20240630.xsd#InventoriesDetails"/>
  <link:calculationLink xlink:role="http://www.westlake.com/role/InventoriesDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InventoryNet_a0ee2328-ac93-4359-82da-6544032f4457" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_InventoryNet"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InventoryFinishedGoodsNetOfReserves_01a6cdc6-9616-4ab1-aa9f-ebc902e35ffa" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_InventoryFinishedGoodsNetOfReserves"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_InventoryNet_a0ee2328-ac93-4359-82da-6544032f4457" xlink:to="loc_us-gaap_InventoryFinishedGoodsNetOfReserves_01a6cdc6-9616-4ab1-aa9f-ebc902e35ffa" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InventoryWorkInProcessAndRawMaterialsNetOfReserves_9007b37a-b9a8-4889-809e-4487b887b76e" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_InventoryWorkInProcessAndRawMaterialsNetOfReserves"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_InventoryNet_a0ee2328-ac93-4359-82da-6544032f4457" xlink:to="loc_us-gaap_InventoryWorkInProcessAndRawMaterialsNetOfReserves_9007b37a-b9a8-4889-809e-4487b887b76e" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InventorySuppliesNetOfReserves_441d4ae3-b6d5-4fc8-b373-41a82eb5c4bf" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_InventorySuppliesNetOfReserves"/>
    <link:calculationArc order="3" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_InventoryNet_a0ee2328-ac93-4359-82da-6544032f4457" xlink:to="loc_us-gaap_InventorySuppliesNetOfReserves_441d4ae3-b6d5-4fc8-b373-41a82eb5c4bf" xlink:type="arc"/>
  </link:calculationLink>
  <link:roleRef roleURI="http://www.westlake.com/role/AccountsPayableDetails" xlink:type="simple" xlink:href="wlk-20240630.xsd#AccountsPayableDetails"/>
  <link:calculationLink xlink:role="http://www.westlake.com/role/AccountsPayableDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccountsPayableCurrent_6814cac2-9e41-425c-81e3-7eb42491a2e8" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_AccountsPayableCurrent"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccountsPayableTradeCurrent_55d61fd0-b00d-41a5-83b2-735c30a56ea8" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_AccountsPayableTradeCurrent"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_AccountsPayableCurrent_6814cac2-9e41-425c-81e3-7eb42491a2e8" xlink:to="loc_us-gaap_AccountsPayableTradeCurrent_55d61fd0-b00d-41a5-83b2-735c30a56ea8" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NotesAndLoansPayableCurrent_ffca944c-b0fd-42d5-96e0-4b9b46866a2c" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_NotesAndLoansPayableCurrent"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_AccountsPayableCurrent_6814cac2-9e41-425c-81e3-7eb42491a2e8" xlink:to="loc_us-gaap_NotesAndLoansPayableCurrent_ffca944c-b0fd-42d5-96e0-4b9b46866a2c" xlink:type="arc"/>
  </link:calculationLink>
  <link:roleRef roleURI="http://www.westlake.com/role/LongTermDebtScheduleofLongtermDebtDetails" xlink:type="simple" xlink:href="wlk-20240630.xsd#LongTermDebtScheduleofLongtermDebtDetails"/>
  <link:calculationLink xlink:role="http://www.westlake.com/role/LongTermDebtScheduleofLongtermDebtDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongTermDebt_e4029e15-de7c-4c81-875c-bb22b5d77697" 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_fb1cb6a7-89b7-49b0-af26-e94eaedeedf7" 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_e4029e15-de7c-4c81-875c-bb22b5d77697" xlink:to="loc_us-gaap_DebtInstrumentCarryingAmount_fb1cb6a7-89b7-49b0-af26-e94eaedeedf7" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentUnamortizedDiscountPremiumAndDebtIssuanceCostsNet_e51d683d-bbd4-4afd-bae8-cce99a6f9844" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DebtInstrumentUnamortizedDiscountPremiumAndDebtIssuanceCostsNet"/>
    <link:calculationArc order="2" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_LongTermDebt_e4029e15-de7c-4c81-875c-bb22b5d77697" xlink:to="loc_us-gaap_DebtInstrumentUnamortizedDiscountPremiumAndDebtIssuanceCostsNet_e51d683d-bbd4-4afd-bae8-cce99a6f9844" xlink:type="arc"/>
  </link:calculationLink>
  <link:roleRef roleURI="http://www.westlake.com/role/LongTermDebtScheduleofLongtermDebtDetails_1" xlink:type="simple" xlink:href="wlk-20240630.xsd#LongTermDebtScheduleofLongtermDebtDetails_1"/>
  <link:calculationLink xlink:role="http://www.westlake.com/role/LongTermDebtScheduleofLongtermDebtDetails_1" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongTermDebt_c2bf54b2-97ef-4ee4-aff0-12ea5d8c8357" 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_LongTermDebtNoncurrent_322cb200-2777-4823-be8c-86dca802fa4c" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_LongTermDebtNoncurrent"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_LongTermDebt_c2bf54b2-97ef-4ee4-aff0-12ea5d8c8357" xlink:to="loc_us-gaap_LongTermDebtNoncurrent_322cb200-2777-4823-be8c-86dca802fa4c" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongTermDebtCurrent_56b85c59-94c1-44a4-8925-89a3822b1ac4" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_LongTermDebtCurrent"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_LongTermDebt_c2bf54b2-97ef-4ee4-aff0-12ea5d8c8357" xlink:to="loc_us-gaap_LongTermDebtCurrent_56b85c59-94c1-44a4-8925-89a3822b1ac4" xlink:type="arc"/>
  </link:calculationLink>
  <link:roleRef roleURI="http://www.westlake.com/role/EarningsandDividendsperShareScheduleofNetIncomeAttributabletoCommonStockholdersDetails" xlink:type="simple" xlink:href="wlk-20240630.xsd#EarningsandDividendsperShareScheduleofNetIncomeAttributabletoCommonStockholdersDetails"/>
  <link:calculationLink xlink:role="http://www.westlake.com/role/EarningsandDividendsperShareScheduleofNetIncomeAttributabletoCommonStockholdersDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_wlk_NetIncomeLossAvailableToCommonStockholders_464432b9-41d2-4a74-a351-65696199527b" xlink:href="wlk-20240630.xsd#wlk_NetIncomeLossAvailableToCommonStockholders"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetIncomeLoss_be9af377-e055-4299-8704-fca4f47294e0" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_NetIncomeLoss"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_wlk_NetIncomeLossAvailableToCommonStockholders_464432b9-41d2-4a74-a351-65696199527b" xlink:to="loc_us-gaap_NetIncomeLoss_be9af377-e055-4299-8704-fca4f47294e0" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ParticipatingSecuritiesDistributedAndUndistributedEarningsLossDiluted_b3cd1481-5768-40b9-990d-99b7b3cdcfd0" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ParticipatingSecuritiesDistributedAndUndistributedEarningsLossDiluted"/>
    <link:calculationArc order="2" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_wlk_NetIncomeLossAvailableToCommonStockholders_464432b9-41d2-4a74-a351-65696199527b" xlink:to="loc_us-gaap_ParticipatingSecuritiesDistributedAndUndistributedEarningsLossDiluted_b3cd1481-5768-40b9-990d-99b7b3cdcfd0" xlink:type="arc"/>
  </link:calculationLink>
  <link:roleRef roleURI="http://www.westlake.com/role/EarningsandDividendsperShareReconciliationofDenominatorforBasicandDilutedEarningsPerShareDetails" xlink:type="simple" xlink:href="wlk-20240630.xsd#EarningsandDividendsperShareReconciliationofDenominatorforBasicandDilutedEarningsPerShareDetails"/>
  <link:calculationLink xlink:role="http://www.westlake.com/role/EarningsandDividendsperShareReconciliationofDenominatorforBasicandDilutedEarningsPerShareDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding_f1a633ca-9075-44cc-b46b-4b9c5c6d0cc7" 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_52d27d5e-d48e-49be-acdc-2daaa9a48968" 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_f1a633ca-9075-44cc-b46b-4b9c5c6d0cc7" xlink:to="loc_us-gaap_WeightedAverageNumberOfSharesOutstandingBasic_52d27d5e-d48e-49be-acdc-2daaa9a48968" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_WeightedAverageNumberDilutedSharesOutstandingAdjustment_974eba95-6a34-4c55-81de-5b787829520d" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.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_f1a633ca-9075-44cc-b46b-4b9c5c6d0cc7" xlink:to="loc_us-gaap_WeightedAverageNumberDilutedSharesOutstandingAdjustment_974eba95-6a34-4c55-81de-5b787829520d" xlink:type="arc"/>
  </link:calculationLink>
</link:linkbase>
