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