Convert BTU per Hour to Kilowatts

About converting BTU per Hour to Kilowatts

BTU per Hour (BTU/h) and Kilowatts (kW) are both units of power, so converting between them is a single multiplication: multiply your BTU per Hour figure by 0.0002931. Ten BTU per Hour comes to 0.002931 Kilowatts, and a hundred works out at 0.02931 Kilowatts.

Rule of thumb: going from BTU per Hour to Kilowatts divides, so the figure always shrinks — it takes about 3,412.14 BTU per Hour to make a single Kilowatt. If your answer came out bigger, you have the conversion the wrong way round.

What is a BTU per Hour?

BTU per hour is the unit American heating and cooling equipment is sized in: furnaces, boilers, air conditioners and heat pumps all carry a BTU/h rating. It is a rate of heat flow — genuinely a power, in the same family as the watt — but the "per hour" is dropped so routinely in advertising that a "12,000 BTU air conditioner" reads as normal, which quietly confuses a quantity of energy with a rate of delivering it. It also inherits the BTU’s vagueness: several BTU definitions exist and differ by a fraction of a percent, so any conversion here rests on one chosen convention.

What is a Kilowatt?

A kilowatt is a thousand watts, the size at which power stops being about gadgets and starts being about infrastructure. It rates the things in a house that actually move the meter — kettles, ovens, showers, heat pumps, immersion heaters — and it is the unit of EV charging, where the kilowatt figure sets how fast a car charges while the battery’s kilowatt-hours set how far it goes. It is also the legal unit of engine power in the European Union: manufacturers must state kW on a vehicle’s paperwork, even though the marketing beside it still leads with horsepower.

To put both in perspective: a window air conditioner is usually 5,000 to 12,000 BTU per hour, while an electric kettle draws a couple of kilowatts.

The converter above updates as you type, and the table lists common values for quick reference. Need the opposite direction? Use the Kilowatts to BTU per Hour converter, or browse all Power converters.