heater grate

Heat BTU Calculator

British Thermal Units (BTUs) are a measurement of energy required to increase temperature, frequently used when discussing HVAC. Use the following calculator to understand how many BTUs are needed to heat your indoor space.

Heating BTUs

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

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

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

climate zone map of North America


Still have questions? Ask an HVAC expert directly via chat or phone.



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