Cooling BTU Calculator

British Thermal Units (BTUs) are a measurement of energy required to change temperature, frequently used when discussing HVAC. Modern air conditioner (AC) manufacturers use BTUs to make it simple to compare AC units with different capacities and designs. In general, the larger the number of BTUs, the higher the cooling capacity. Use the following calculator to understand how many BTUs are needed to cool your indoor space.

Learn more about BTUs and other HVAC terms in our HVAC Glossary.

Cooling BTUs

Enter information about your space to calculate the amount of British Thermal Units (BTUs) required to properly cool it.

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Your area requires {{ calcFinal }} BTUs to cool properly.

If you live in North America, use the map below to choose the appropriate climate zone number.

climate zone map of North America

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