Convert BTU to kilojoules
British thermal units to kilojoules. Enter a value to convert, or use the BTU to kilojoules chart further down the page.
1 British thermal unit equals 1.055055853 kilojoules. Going the other way, 1 kilojoule = 0.9478171203 British thermal units.
How to convert BTU to kilojoules
To convert British thermal units to kilojoules, multiply the British thermal unit value by 1.055055853. You can also divide by 0.9478171203 to get the same answer.
kJ = BTU × 1.055055853
Worked example
Convert 15 BTU to kilojoules:
15 BTU = 15.82583779 kJ
BTU to kilojoules conversion chart
Use this BTU to kilojoules table for quick reference without typing anything.
| British thermal units (BTU) | kilojoules (kJ) |
|---|---|
| 0.01 BTU | 0.01055055853 kJ |
| 0.1 BTU | 0.1055055853 kJ |
| 1 BTU | 1.055055853 kJ |
| 2 BTU | 2.110111705 kJ |
| 3 BTU | 3.165167558 kJ |
| 5 BTU | 5.275279263 kJ |
| 10 BTU | 10.55055853 kJ |
| 20 BTU | 21.10111705 kJ |
| 50 BTU | 52.75279263 kJ |
| 100 BTU | 105.5055853 kJ |
| 1,000 BTU | 1,055.055853 kJ |
What is a British thermal unit?
The BTU is the energy needed to raise one pound of water by one degree Fahrenheit — about 1,055 joules. It rates heating and air-conditioning equipment in the US.
What is a kilojoule?
The kilojoule is 1,000 joules and is the food-energy unit on nutrition labels outside the United States.
Frequently asked questions
How many kilojoules are in a British thermal unit?
1 BTU equals 1.055055853 kilojoules. Going the other way, 1 kilojoules is 0.9478171203 BTU.
How do you convert BTU to kilojoules?
To convert British thermal units to kilojoules, multiply the British thermal unit value by 1.055055853. You can also divide by 0.9478171203 to get the same answer.
What is 10 BTU in kilojoules?
10 BTU equals 10.55055853 kilojoules. The conversion chart on this page lists the other values people look up most often.
Related energy conversions
Convert BTU to other units
- kilojoules to BTU
- BTU to joules
- BTU to calories
- BTU to kilocalories
- BTU to kWh
- BTU to Wh
- BTU to foot pounds
Convert other units to kilojoules
- joules to kilojoules
- calories to kilojoules
- kilocalories to kilojoules
- kWh to kilojoules
- Wh to kilojoules
- foot pounds to kilojoules
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