Convert British thermal units to kilojoules
British thermal unit (BTU) to kilojoule (kJ). One British thermal unit equals 1.0551 kilojoules.
Formula
British thermal unit to kilojoule conversion table
| British thermal units | Kilojoules | Kilojoules | British thermal units |
|---|---|---|---|
| 1 BTU | 1.0551 kJ | 1 kJ | 0.947817 BTU |
| 2 BTU | 2.1101 kJ | 2 kJ | 1.8956 BTU |
| 3 BTU | 3.1652 kJ | 3 kJ | 2.8435 BTU |
| 5 BTU | 5.2753 kJ | 5 kJ | 4.7391 BTU |
| 10 BTU | 10.5506 kJ | 10 kJ | 9.4782 BTU |
| 20 BTU | 21.1011 kJ | 20 kJ | 18.9563 BTU |
| 50 BTU | 52.7528 kJ | 50 kJ | 47.3909 BTU |
| 100 BTU | 105.51 kJ | 100 kJ | 94.7817 BTU |
| 500 BTU | 527.53 kJ | 500 kJ | 473.91 BTU |
| 1000 BTU | 1055.06 kJ | 1000 kJ | 947.82 BTU |
To convert British thermal units to kilojoules, multiply the number of British thermal units by 1.0551. One British thermal unit equals 1.0551 kilojoules, and one kilojoule equals 0.947817 British thermal units, so the relationship is fixed and exact. As a worked example, 10 BTU comes to 10.5506 kJ. Enter your own figure in the converter above to get an instant answer, or use the swap button to flip the direction. This is a energy conversion, and like every tool on UnitGlide it runs locally in your browser with no account or upload required. The table further down shows a range of common British thermal unit values already worked out in kilojoules, plus the reverse kilojoule to British thermal unit direction, which is handy for quick reference or double-checking a result by hand.
Frequently asked questions
How many kilojoules are in a British thermal unit?
One British thermal unit equals 1.0551 kilojoules. The ratio is constant, so you can multiply any number of British thermal units by 1.0551 to get kilojoules.
What is the formula to convert British thermal units to kilojoules?
Use kilojoules = British thermal units × 1.0551. UnitGlide applies this exact formula for every value, so results stay accurate across the whole range.
How do I convert kilojoules back to British thermal units?
Go the other way by using one kilojoule equals 0.947817 British thermal units. You can also press the swap button in the converter above to flip the direction in one click.
Is this British thermal unit to kilojoule converter accurate?
Yes. It uses internationally defined SI conversion factors, as maintained by the BIPM, and all math runs in your browser so nothing is rounded away on a server. For everyday use the displayed precision is more than enough.