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BTU to kW Calculator: BTU/hr to Kilowatts

Convert BTU/hr to kilowatts, watts, and refrigeration tons, or kW back to BTU, for heat pumps, air conditioners, furnaces, and space heaters. This is the power conversion (heating and cooling output). Converting BTU energy into kilowatt-hours instead? Use the WattSimple BTU to kWh converter instead.

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Power

10.55 kW

BTU/hr
36,000
Kilowatts
10.55 kW
Watts
10,551 W
Refrigeration tons
3 tons

1 kW = 3,412 BTU/hr; 1 refrigeration ton = 12,000 BTU/hr. This converts units. To size a heat pump or AC for a room, use the heat pump sizing calculator below, which factors in square footage and climate.

Frequently asked questions

Divide BTU per hour by 3,412.14: kW = BTU/hr ÷ 3,412. For example, a 36,000 BTU/hr heat pump is about 10.5 kW of heat output. To go the other way, BTU/hr = kW × 3,412.

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WattSimple. (2026, July 19). BTU to kW Calculator: BTU/hr to Kilowatts. https://wattsimple.com/convert/btu-to-kw

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Sources & standards

This tool's methodology and data follow US standards and authoritative public datasets: