BTU to Kilowatt-hours converter

Quick reference

BTU	Kilowatt-hours
1	0.000293
2	0.000586
5	0.001465
10	0.002931
20	0.005861
25	0.007327
50	0.014654
100	0.029307
250	0.073268
500	0.146536
1,000	0.293071

About energy units

Energy's unit zoo exists because each field measured it before agreeing on the joule: food labels use kilocalories (confusingly printed as 'Calories'), electricity bills use kilowatt-hours, US heating equipment uses BTU, and chemistry uses the small calorie. Exact bridges: one food kilocalorie is 4,184 joules, one kilowatt-hour is 3.6 million joules (or 3,412 BTU). That means a 2,000 kcal daily diet is about 2.3 kWh, roughly what a fridge uses in a day.

More energy conversions

Kilowatt-hours → BTU Kilocalories (food) → Kilojoules Kilojoules → Kilocalories (food)Kilowatt-hours → BTU Calories (small) → Joules All converters

Frequently asked questions

What is the exact formula for BTU to Kilowatt-hours?

Multiply the BTU value by 0.00029307. This comes from the exact unit definitions, not a rounded approximation.

Is this conversion exact?

The underlying ratio is exact where a legal definition exists (for example, 1 inch = 25.4 mm exactly). Displayed results are rounded to six decimal places for readability.

Can I convert Kilowatt-hours back to BTU?

Yes. Use the reverse converter linked below, or just swap which field you type into: the live converter recalculates either direction.