BTU to Kilojoules Converter
How to convert BTU to kilojoules
kilojoules = BTU × 1.05505585
To convert BTU to kilojoules, multiply the number of BTU by 1.05505585.
1 BTU = 1.05505585 kJ
Examples
- 1,000 BTU × 1.05505585 = 1,055.05585 kJ
- About one therm: 100,000 BTU × 1.05505585 = 105,505.585 kJ
Good to know
This is the International Table BTU, 1055.05585262 J. Other definitions exist, such as the thermochemical BTU (about 1054.35 J); they differ from it by up to about 0.5%.
BTU to kilojoules conversion table
| BTU | Kilojoules (kJ) |
|---|---|
| 1 BTU | 1.05505585 kJ |
| 10 BTU | 10.5505585 kJ |
| 100 BTU | 105.505585 kJ |
| 500 BTU | 527.527926 kJ |
| 1,000 BTU | 1,055.05585 kJ |
| 2,000 BTU | 2,110.11171 kJ |
| 5,000 BTU | 5,275.27926 kJ |
| 10,000 BTU | 10,550.5585 kJ |
| 12,000 BTU | 12,660.6702 kJ |
| 20,000 BTU | 21,101.1171 kJ |
| 50,000 BTU | 52,752.7926 kJ |
| 100,000 BTU | 105,505.585 kJ |
| 500,000 BTU | 527,527.926 kJ |
| 1,000,000 BTU | 1,055,055.85 kJ |
Unit definitions
- BTU
- The British thermal unit is roughly the heat needed to raise one pound of water by one degree Fahrenheit. The International Table BTU is exactly 1055.05585262 joules, and it is used for heating and cooling in the United States.
- Kilojoule (kJ)
- A kilojoule is 1000 joules. It is the unit for food energy on nutrition labels in Australia, New Zealand and, alongside kilocalories, the European Union.