kWh to BTU Converter

One kilowatt-hour equals 3412.1416 british thermal units (BTU). To convert kilowatt-hours to british thermal units, multiply by 3412.1416; to go back the other way, multiply by 0.00029307107 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 kilowatt-hours and british thermal units actually measure

Kilowatt-hour (kWh) — A kilowatt-hour is a thousand watt-hours, or 3.6 megajoules. Electricity billing everywhere, and EV battery capacity.

British thermal unit (BTU) — A British thermal unit raises a pound of water by one degree Fahrenheit — about 1,055 joules. Heating, air conditioning and gas in the US.

kWh to BTU conversion table

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

How to convert kilowatt-hours to british thermal units by hand

Multiply the number of kilowatt-hours by 3412.1416.

For example, 25 kWh × 3412.1416 = 85303.541 BTU.

Going the other way, divide by 3412.1416 — or multiply by 0.00029307107, 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.