--- title: "Cooling BTU Calculator | HVAC Sizing Calculator | XTRAW Tools" description: "Estimate cooling BTU needed for a space based on area, occupants, and sun exposure. Use this free browser-based calculator from XTRAW Tools for BTU, heating, cooling, HVAC tonnage, and home comfort estimates." url: "https://xtraw.com/tools/everyday-utilities/home-household-tools/cooling-btu-calculator" date: "2026-05-21T23:56:41+00:00" language: "en-GB" --- [Wind Chill Calculator](https://xtraw.com/tools/everyday-utilities/home-household-tools/wind-chill-calculator)[Air Changes Per Hour Calculator](https://xtraw.com/tools/everyday-utilities/home-household-tools/air-changes-per-hour-calculator) [![Cooling BTU Calculator from XTRAW Tools](https://xtraw.com/images/virtuemart/product/xtraw-cooling-btu-calculator-360x360.jpg)](https://xtraw.com/images/virtuemart/product/xtraw-cooling-btu-calculator-360x360.jpg "Cooling BTU Calculator from XTRAW Tools") new [Back to: Home & Household Tools](https://xtraw.com/tools/everyday-utilities/home-household-tools "Home & Household Tools") # Cooling BTU Calculator Estimate cooling BTU needed for a space based on area, occupants, and sun exposure. Use this free browser-based cooling btu calculator from XTRAW Tools. **Cooling BTU Calculator** helps you estimate cooling BTU needed for a space based on area, occupants, and sun exposure. Use this free browser-based calculator from XTRAW Tools to compare inputs, estimate results, and plan your next step. ## How to Use the Cooling BTU Calculator 1. Enter the required calculator inputs shown in the form. 2. Review the roofing, gutter, drainage, ramp, tile, grout, BTU, HVAC, room-size, airflow, duct, or ventilation assumptions. 3. Run the calculator, then adjust one input at a time to compare scenarios or check your estimate. ## What This Calculator Helps With Estimate cooling BTU needed for a space based on area, occupants, and sun exposure. It is designed for contractors, homeowners, builders, remodelers, roofers, HVAC users, tile installers, accessibility planners, DIY users, and construction planners who want a fast browser-based estimate before relying on supplier charts, contractor estimates, engineering plans, HVAC design software, or professional sources. - Floor Area: 300 ft² - Number of Occupants: 2 - Sun Exposure: moderate ## Common Uses People use this calculator when they need a quick way to estimate BTU capacity, heating load, cooling load, HVAC tonnage, and room comfort assumptions. - **Measurement:** Use dimensions, surface area, slopes, grade, pitch, room volume, BTU capacity, airflow, and project measurements to calculate a practical result. - **Budgeting:** Support rough cost planning by estimating quantities or capacity before comparing supplier prices or contractor quotes. - **Project Planning:** Plan job scope, material quantities, comfort assumptions, airflow needs, slope requirements, and construction details before starting a project. ## Formula or Method BTU = area × 20 + sun adj + (occupants × 600 BTU/hr) ## Example **Example inputs:** Floor Area: 300 ft²; Number of Occupants: 2; Sun Exposure: moderate **Example result:** Using the default inputs, estimated cooling capacity is 7,200 BTU/hr. ## Related Tools - [Room BTU Calculator](https://xtraw.com/tools/room-btu-calculator) - [Heating BTU Calculator](https://xtraw.com/tools/heating-btu-calculator) - [HVAC Tonnage Calculator](https://xtraw.com/tools/hvac-tonnage-calculator) - [CFM Calculator](https://xtraw.com/tools/cfm-calculator) - [Duct Size Calculator](https://xtraw.com/tools/duct-size-calculator) ## Cooling BTU Calculator FAQ ### Is the Cooling BTU Calculator free? Yes. This calculator is free to use on XTRAW Tools. ### Do I need to create an account? No. XTRAW tools are designed for browser-based use without requiring an account. ### Are the results exact? Results may be estimates depending on the inputs, formula, rounding, project assumptions, waste factor, coverage rate, airflow method, sizing rule, supplier specifications, and purpose of the calculator. Always verify important results before relying on them. **Disclaimer:** This calculator is provided for general informational, educational, and convenience purposes only. It is not construction, engineering, HVAC design, accessibility compliance, safety, building-code, structural, roofing, drainage, ventilation, contractor, supplier, legal, financial, or professional advice. Always verify important results with a qualified professional, contractor, engineer, HVAC professional, supplier, manufacturer documentation, local code authority, or authoritative source before making decisions. **Related Products** ![Tooltip]() [![Room BTU Calculator from XTRAW Tools](https://xtraw.com/images/virtuemart/product/resized/xtraw-room-btu-calculator-360x360_230x230.jpg) Room BTU Calculator](https://xtraw.com/tools/everyday-utilities/home-household-tools/room-btu-calculator "Room BTU Calculator") Estimate BTU capacity needed to heat or cool a room. Use this free browser-based room btu calculator from XTRAW Tools. Custom prototype for related products [![Heating BTU Calculator from XTRAW Tools](https://xtraw.com/images/virtuemart/product/resized/xtraw-heating-btu-calculator-360x360_230x230.jpg) Heating BTU Calculator](https://xtraw.com/tools/everyday-utilities/home-household-tools/heating-btu-calculator "Heating BTU Calculator") Estimate BTU/hr needed to heat a space based on area and desired temperature rise. Use this free browser-based heating btu calculator from XTRAW Tools. Custom prototype for related products [![HVAC Tonnage Calculator from XTRAW Tools](https://xtraw.com/images/virtuemart/product/resized/xtraw-hvac-tonnage-calculator-360x360_230x230.jpg) HVAC Tonnage Calculator](https://xtraw.com/tools/everyday-utilities/home-household-tools/hvac-tonnage-calculator "HVAC Tonnage Calculator") Calculate required HVAC tonnage for a home or commercial space. Use this free browser-based hvac tonnage calculator from XTRAW Tools. Custom prototype for related products [![CFM Calculator from XTRAW Tools](https://xtraw.com/images/virtuemart/product/resized/xtraw-cfm-calculator-360x360_230x230.jpg) CFM Calculator](https://xtraw.com/tools/everyday-utilities/home-household-tools/cfm-calculator "CFM Calculator") Calculate required airflow (CFM) for a room based on ACH or HVAC tonnage. Use this free browser-based cfm calculator from XTRAW Tools. Custom prototype for related products [![Duct Size Calculator from XTRAW Tools](https://xtraw.com/images/virtuemart/product/resized/xtraw-duct-size-calculator-360x360_230x230.jpg) Duct Size Calculator](https://xtraw.com/tools/everyday-utilities/home-household-tools/duct-size-calculator "Duct Size Calculator") Calculate required round or rectangular duct size for a given CFM. Use this free browser-based duct size calculator from XTRAW Tools. Custom prototype for related products **Related Categories** ![Tooltip]()[![Calculators category image](https://xtraw.com/images/virtuemart/category/2_calculators.jpg) Calculators](https://xtraw.com/tools/calculators "Calculators") Custom prototype for related categories [![Construction & Home Calculators category image](https://xtraw.com/images/virtuemart/category/19_construction_and_home_calculators.jpg) Construction & Home Calculators](https://xtraw.com/tools/calculators/construction-home-calculators "Construction & Home Calculators") Custom prototype for related categories [![Construction Calculators category image](https://xtraw.com/images/virtuemart/category/158_construction-calculators.jpg) Construction Calculators](https://xtraw.com/tools/calculators/construction-home-calculators/construction-calculators "Construction Calculators") Custom prototype for related categories [![HVAC Calculators category image](https://xtraw.com/images/virtuemart/category/264_hvac-calculators.jpg) HVAC Calculators](https://xtraw.com/tools/calculators/construction-home-calculators/construction-calculators/hvac-calculators "HVAC Calculators") Custom prototype for related categories [![Home & Household Tools category image](https://xtraw.com/images/virtuemart/category/165_home-household-tools.jpg) Home & Household Tools](https://xtraw.com/tools/everyday-utilities/home-household-tools "Home & Household Tools") Custom prototype for related categories ## Schema ```json { "@context": "https://schema.org", "@graph": [ { "@type": "Organization", "@id": "https://xtraw.com#organization", "name": "XTRAW Tools", "alternateName": "XTRAW", "url": "https://xtraw.com", "logo": { "@type": "ImageObject", "@id": "https://xtraw.com#logo", "url": "https://xtraw.com/images/xtraw-logo.png#joomlaImage://local-images/xtraw-logo.png?width=1100&height=400", "contentUrl": "https://xtraw.com/images/xtraw-logo.png#joomlaImage://local-images/xtraw-logo.png?width=1100&height=400", "caption": "XTRAW Tools" }, "image": { "@id": "https://xtraw.com#logo" }, "email": "jason@vuumarketing.com", "description": "XTRAW Tools provides free browser-based calculators, converters, generators, developer tools, business tools, file tools, writing tools, and everyday utilities.", "knowsAbout": [ "calculators", "online calculators", "unit converters", "file tools", "developer tools", "business calculators", "finance calculators", "math calculators", "education calculators", "health calculators", "construction calculators", "real estate calculators", "writing tools", "random generators", "everyday utilities" ], "contactPoint": { "@type": "ContactPoint", "contactType": "customer support", "email": "jason@vuumarketing.com", "url": "https://xtraw.com/contact" } }, { "@type": "WebSite", "@id": "https://xtraw.com#website", "name": "XTRAW Tools", "alternateName": "XTRAW Tools", "url": "https://xtraw.com", "publisher": { "@id": "https://xtraw.com#organization" }, "inLanguage": "en-gb", "about": { "@id": "https://xtraw.com#organization" } }, { "@type": "ImageObject", "@id": "https://xtraw.com/tools/everyday-utilities/home-household-tools/cooling-btu-calculator#primaryimage", "url": "https://xtraw.com/https://xtraw.com/images/virtuemart/product/xtraw-cooling-btu-calculator-360x360.jpg", "contentUrl": "https://xtraw.com/https://xtraw.com/images/virtuemart/product/xtraw-cooling-btu-calculator-360x360.jpg", "caption": "Cooling BTU Calculator", "representativeOfPage": true }, { "@type": "WebPage", "@id": "https://xtraw.com/tools/everyday-utilities/home-household-tools/cooling-btu-calculator#webpage", "url": "https://xtraw.com/tools/everyday-utilities/home-household-tools/cooling-btu-calculator", "name": "Cooling BTU Calculator | HVAC Sizing Calculator | XTRAW Tools", "headline": "Cooling BTU Calculator", "description": "Estimate cooling BTU needed for a space based on area, occupants, and sun exposure. 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