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 1.05506 kilojoules. Going the other way, 1 kilojoule = 0.947817 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 = 15.8258 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 | 0.0105506 kJ |
| 0.1 BTU | 0.105506 kJ |
| 1 BTU | 1.05506 kJ |
| 2 BTU | 2.11011 kJ |
| 3 BTU | 3.16517 kJ |
| 5 BTU | 5.27528 kJ |
| 10 BTU | 10.5506 kJ |
| 20 BTU | 21.1011 kJ |
| 50 BTU | 52.7528 kJ |
| 100 BTU | 105.506 kJ |
| 1,000 BTU | 1,055.06 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 1.05506 kilojoules. Going the other way, 1 kilojoules is 0.947817 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 10.5506 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
Popular conversions
cm to inchesinches to cmkg to lbslbs to kgCelsius to FahrenheitFahrenheit to Celsiusmm to inchesinches to mmkm to milesmiles to kmmeters to feetfeet to meterscm to feetfeet to inchesinches to feetml to fl ozfl oz to mlliters to gallonsgallons to literscups to ml