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BTU to kW Calculator

Convert BTU/hr to kilowatts, watts, and refrigeration tons — or kW back to BTU — for heat pumps, air conditioners, furnaces, and space heaters. Handy for comparing a unit's heating or cooling output across the units manufacturers and contractors use.

Convert

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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Sources & standards

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