BTU to Kilowatt-hours Converter
1 BTU = 0.000293071 kilowatt-hours.
Enter a value
Result
1 British thermal unit =
0.000293071 kWh
1 BTU × 0.000293071 = 0.000293071 kWh
1 kcal = 4.184 kJ · 1 kWh = 3,600 kJ
The working
- 1. Convert 1 BTU to joules: 1 × 1,055.06 = 1,055.06.
- 2. Convert to kWh: 1,055.06 ÷ 3,600,000 = 0.000293071.
1 BTU in every unit
Everyday energy
- A banana
- ≈ 400 kJ (95 kcal)
- Boiling a kettle
- ≈ 0.1 kWh
- A litre of petrol
- ≈ 34 MJ
Conversion table
BTU to Kilowatt-hours
| BTU | Kilowatt-hours |
|---|---|
| 1,000 | 0.29307 |
| 5,000 | 1.4654 |
| 8,000 | 2.3446 |
| 10,000 | 2.9307 |
| 12,000 | 3.5169 |
| 18,000 | 5.2753 |
| 24,000 | 7.0337 |
| 36,000 | 10.551 |
| 50,000 | 14.654 |
| 100,000 | 29.307 |
Kilowatt-hours to BTU
| Kilowatt-hours | BTU |
|---|---|
| 1,000 | 3,412,100 |
| 5,000 | 17,061,000 |
| 8,000 | 27,297,000 |
| 10,000 | 34,121,000 |
| 12,000 | 40,946,000 |
| 18,000 | 61,419,000 |
| 24,000 | 81,891,000 |
| 36,000 | 122,840,000 |
| 50,000 | 170,610,000 |
| 100,000 | 341,210,000 |
Formula and worked example
kilowatt-hours = BTU × 0.00029307107 (1 BTU is about 1,055.06 J; 1 kWh is exactly 3.6 MJ).
Convert 10,000 BTU to kilowatt-hours: 10,000 × 0.00029307107 = 2.93071 kWh.
When you need this
Air conditioners, gas heaters and boilers are often rated in BTU. Converting to kWh lets you compare running costs with electricity prices.
Questions people ask
How many kilowatt-hours are in a BTU?
One BTU is 0.00029307107 kilowatt-hours. 1 BTU is about 1,055.06 J.
How do I convert BTU to kilowatt-hours?
Multiply the number of BTU by 0.00029307107, or divide by 3,412.1416.
What is 18,000 BTU in kWh?
18,000 BTU is 5.27528 kilowatt-hours.
How do I convert kilowatt-hours back to BTU?
Multiply by 3,412.1416: one kilowatt-hour is 3,412.1416 BTU.
Related conversions
How we calculate this
We use the standard published formula or definition for this calculation, and we show the working so you can check it. Source: NIST Special Publication 811, Guide for the Use of the International System of Units.
Spotted a mistake? Tell us and we'll check it. How we check our calculators