Joules to BTU Converter
How to convert joules to BTU
BTU = joules ÷ 1,055.05585
To convert joules to BTU, divide the number of joules by 1,055.05585.
1 J = 0.00094781712 BTU
Examples
- 1,000 J ÷ 1,055.05585 = 0.94781712 BTU
- One kilocalorie: 4,184 J ÷ 1,055.05585 = 3.96566683 BTU
Good to know
One International Table BTU is about 1055 joules, or 1.055 kilojoules.
This is the International Table BTU, 1055.05585262 J. Other definitions exist, such as the thermochemical BTU (about 1054.35 J); they differ from it by up to about 0.5%.
Joules to BTU conversion table
| Joules (J) | BTU |
|---|---|
| 1 J | 0.00094781712 BTU |
| 2 J | 0.00189563424 BTU |
| 5 J | 0.0047390856 BTU |
| 10 J | 0.0094781712 BTU |
| 20 J | 0.0189563424 BTU |
| 50 J | 0.047390856 BTU |
| 100 J | 0.094781712 BTU |
| 200 J | 0.189563424 BTU |
| 250 J | 0.23695428 BTU |
| 500 J | 0.47390856 BTU |
| 1,000 J | 0.94781712 BTU |
| 2,000 J | 1.89563424 BTU |
| 2,500 J | 2.3695428 BTU |
| 5,000 J | 4.7390856 BTU |
| 10,000 J | 9.4781712 BTU |
Unit definitions
- Joule (J)
- The joule is the SI unit of energy, equal to the work done by a force of one newton over one meter, or one watt for one second.
- BTU
- The British thermal unit is roughly the heat needed to raise one pound of water by one degree Fahrenheit. The International Table BTU is exactly 1055.05585262 joules, and it is used for heating and cooling in the United States.