Convert British Thermal Unit to Kilojoule
Use this free converter to change british thermal units (BTU) into kilojoules (kJ). British thermal unit and kilojoule both measure energy. As a quick reference, 1 BTU equals 1.0550559 kJ, and 1 kJ equals 0.94781712 BTU.
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Kilojoule (kJ)
1.0550559
1 BTU = 1.0550559 kJ
Energy conversion table
| British Thermal Unit | Kilojoule |
|---|---|
| 0.01 | 0.010550558 |
| 0.1 | 0.10550558 |
| 0.5 | 0.52752793 |
| 1 | 1.0550559 |
| 2 | 2.1101117 |
| 3 | 3.1651676 |
| 5 | 5.2752792 |
| 10 | 10.550558 |
| 20 | 21.101117 |
| 25 | 26.376396 |
| 50 | 52.752792 |
| 100 | 105.50558 |
| 1,000 | 1055.0558 |
How to convert British Thermal Unit to Kilojoule
Multiply the british thermal unit value by 1.0550559 to get kilojoules.
- Enter the number of british thermal units you want to convert.
- The converter instantly shows the equivalent value in kilojoules.
- Worked example: 15 BTU × 1.0550559 = 15.825838 kJ.
- Use the swap button to reverse the conversion (kilojoule to british thermal unit).
About these units
British Thermal Unit (BTU)
- Definition
- A British thermal unit (BTU) is the energy needed to raise one pound of water by one degree Fahrenheit.
- History
- It developed with steam engineering in Britain and the United States.
- Current use
- BTUs rate heating, air-conditioning, and appliance energy in the US.
Kilojoule (kJ)
- Definition
- A kilojoule (kJ) is 1,000 joules, a practical size for food energy and mechanical work.
- History
- It is a metric multiple of the joule.
- Current use
- Kilojoules express food energy on nutrition labels in many countries.
Frequently asked questions
How many kilojoules are in a british thermal unit?
There are 1.0550559 kJ in 1 BTU. To convert, multiply the number of british thermal units by 1.0550559.
How do I convert british thermal units to kilojoules?
Multiply the british thermal unit value by 1.0550559 to get kilojoules. For example, 10 BTU = 10.550558 kJ.
Is this british thermal unit-to-kilojoule converter free?
Yes. This converter is completely free, runs entirely in your browser, and requires no sign-up. Your inputs never leave your device.
Convert British Thermal Unit to other energy units
| Unit | 1 British Thermal Unit equals |
|---|---|
| Joule (J) | 1055.0558 J |
| Kilojoule (kJ) | 1.0550559 kJ |
| Calorie (cal) | 252.1644 cal |
| Kilocalorie (kcal) | 0.2521644 kcal |
| Watt Hour (Wh) | 0.29307107 Wh |
| Kilowatt Hour (kWh) | 0.00029307107 kWh |
| Electronvolt (eV) | 6.5851e+21 eV |
| Foot-Pound (ft·lb) | 778.16926 ft·lb |