Convert British thermal units to joules
British thermal unit (BTU) to joule (J). One British thermal unit equals 1055.06 joules.
Formula
British thermal unit to joule conversion table
| British thermal units | Joules | Joules | British thermal units |
|---|---|---|---|
| 1 BTU | 1055.06 J | 1 J | 0.000948 BTU |
| 2 BTU | 2110.11 J | 2 J | 0.001896 BTU |
| 3 BTU | 3165.17 J | 3 J | 0.002843 BTU |
| 5 BTU | 5275.28 J | 5 J | 0.004739 BTU |
| 10 BTU | 10550.56 J | 10 J | 0.009478 BTU |
| 20 BTU | 21101.12 J | 20 J | 0.018956 BTU |
| 50 BTU | 52752.79 J | 50 J | 0.047391 BTU |
| 100 BTU | 105505.59 J | 100 J | 0.094782 BTU |
| 500 BTU | 527527.93 J | 500 J | 0.473909 BTU |
| 1000 BTU | 1055055.85 J | 1000 J | 0.947817 BTU |
To convert British thermal units to joules, multiply the number of British thermal units by 1055.06. One British thermal unit equals 1055.06 joules, and one joule equals 0.000948 British thermal units, so the relationship is fixed and exact. As a worked example, 10 BTU comes to 10550.56 J. 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 joules, plus the reverse joule to British thermal unit direction, which is handy for quick reference or double-checking a result by hand.
Frequently asked questions
How many joules are in a British thermal unit?
One British thermal unit equals 1055.06 joules. The ratio is constant, so you can multiply any number of British thermal units by 1055.06 to get joules.
What is the formula to convert British thermal units to joules?
Use joules = British thermal units × 1055.06. UnitGlide applies this exact formula for every value, so results stay accurate across the whole range.
How do I convert joules back to British thermal units?
Go the other way by using one joule equals 0.000948 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 joule 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.