BTU Calculator

Get instant, accurate btu answers with our free BTU Calculator. No account needed, just quick results.

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How the BTU Calculator Is Calculated

This calculator uses a standard HVAC rule of thumb — approximately 20 BTU of cooling capacity per square foot of room — for a quick, general sizing estimate.

About the BTU Calculator

Get instant, accurate btu answers with our free BTU Calculator. No account needed, just quick results.