BTU to Kilojoules
Convert BTU to Kilojoules with an exact factor. One BTU equals 1.05505585 Kilojoules.
Result1.05505585
How to convert BTU to Kilojoules
The converter above changes BTU into Kilojoules instantly. As a reference point, one BTU corresponds to 1.05505585 Kilojoules, and one kilojoule corresponds to 0.94781712 BTU. Use the table below for common values.
BTU × 1.05505585 = Kilojoules
For example, 5 BTU = 5.27527926 Kilojoules.
About the units
- BTU (BTU) — A British thermal unit, about 1,055 joules.
- Kilojoules (kJ) — One thousand joules.
BTU to Kilojoules conversion table
| BTU | Kilojoules |
|---|---|
| 1 BTU | 1.05505585 kJ |
| 2 BTU | 2.11011171 kJ |
| 3 BTU | 3.16516756 kJ |
| 5 BTU | 5.27527926 kJ |
| 10 BTU | 10.55055853 kJ |
| 20 BTU | 21.10111705 kJ |
| 25 BTU | 26.37639632 kJ |
| 50 BTU | 52.75279263 kJ |
| 100 BTU | 105.50558526 kJ |
| 250 BTU | 263.76396316 kJ |
| 500 BTU | 527.52792631 kJ |
| 1,000 BTU | 1,055.05585262 kJ |
Kilojoules to BTU conversion table
| Kilojoules | BTU |
|---|---|
| 1 kJ | 0.94781712 BTU |
| 2 kJ | 1.89563424 BTU |
| 3 kJ | 2.84345136 BTU |
| 5 kJ | 4.7390856 BTU |
| 10 kJ | 9.4781712 BTU |
| 20 kJ | 18.95634241 BTU |
| 25 kJ | 23.69542801 BTU |
| 50 kJ | 47.39085602 BTU |
| 100 kJ | 94.78171203 BTU |
| 250 kJ | 236.95428008 BTU |
| 500 kJ | 473.90856016 BTU |
| 1,000 kJ | 947.81712031 BTU |
Frequently asked questions
How many Kilojoules is one BTU?
One BTU is 1.05505585 Kilojoules.
Are these energy conversions accurate?
Yes. They use the exact standard unit definitions, so results are accurate to the number of decimals shown.
What is the formula to convert BTU to Kilojoules?
Multiply the number of BTU by 1.05505585. To convert back, multiply Kilojoules by 0.94781712.
This tool is provided for general information only. Verify important figures independently. · Last reviewed: August 25, 2026