How to convert joules to British thermal units
Formula: BTU = J × 0.000947817
Worked example: 1,000 J → 1,000 × 0.000947817 = 0.947817 BTU
Joules to British thermal units conversion chart
| Joules (J) | British thermal units (BTU) |
|---|---|
| 1 J | 0.000947817 BTU |
| 2 J | 0.00189563 BTU |
| 3 J | 0.00284345 BTU |
| 4 J | 0.00379127 BTU |
| 5 J | 0.00473909 BTU |
| 6 J | 0.0056869 BTU |
| 7 J | 0.00663472 BTU |
| 8 J | 0.00758254 BTU |
| 9 J | 0.00853035 BTU |
| 10 J | 0.00947817 BTU |
| 12 J | 0.0113738 BTU |
| 15 J | 0.0142173 BTU |
| 20 J | 0.0189563 BTU |
| 25 J | 0.0236954 BTU |
| 30 J | 0.0284345 BTU |
| 40 J | 0.0379127 BTU |
| 50 J | 0.0473909 BTU |
| 75 J | 0.0710863 BTU |
| 100 J | 0.0947817 BTU |
| 250 J | 0.236954 BTU |
| 500 J | 0.473909 BTU |
| 1,000 J | 0.947817 BTU |
What is a joule?
The joule is the SI unit of energy: the work done by a force of one newton over one meter, or one watt for one second. It is small; lifting an apple about one meter takes roughly one joule.
What is a British thermal unit?
The British thermal unit, about 1,055 joules, is the heat needed to warm one pound of water by one degree Fahrenheit. US furnaces, water heaters, grills and natural gas are rated in BTU.