BTU/hr to kW Converter

One btu per hour equals 0.00029307107 kilowatts (kW). To convert btu per hours to kilowatts, multiply by 0.00029307107; to go back the other way, multiply by 3412.1416 instead.

The converter above does it as you type and shows the working underneath, so you can check the arithmetic rather than take the number on trust.

What btu per hours and kilowatts actually measure

BTU per hour (BTU/hr) — BTU per hour measures heat flow — one British thermal unit each hour. Air conditioning, heating and boiler ratings.

Kilowatt (kW) — A kilowatt is a thousand watts. Heaters, EV chargers, motors and domestic electricity supply.

BTU/hr to kW conversion table

The most common values, worked out in advance. Anything not listed can be typed straight into the converter.

How to convert btu per hours to kilowatts by hand

Multiply the number of btu per hours by 0.00029307107.

For example, 25 BTU/hr × 0.00029307107 = 0.0073267767 kW.

Going the other way, divide by 0.00029307107 — or multiply by 3412.1416, which is the same thing and easier to do in your head.

Everything runs in your browser

There is no server involved in the calculation. The numbers you type never leave your device, nothing is logged, and the page keeps working with no connection once it has loaded. That is not a marketing line — it is simply how the tool is built, because a calculation like this has no reason to touch a network.