Convert BTU (BTU) to joule (J).
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Joule to BTU Converter (J to BTU)
Convert joule (J) to BTU (BTU).Unit Converter · Energy
Quick answer
1 joule (J) is approximately equal to 0.00094782 BTUs (BTU). 1 BTU is approximately equal to 1,055.056 joules (J).
To convert J to BTU, multiply the value in joules by 0.0009478171. For example, 10 J = 0.00947817 BTU, and 100 J = 0.09478171 BTU.
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How to convert joules to BTUs
How many BTUs are in a joule? 1 joule is about 0.00094782 BTUs. This free J to BTU converter and joule to BTU calculator gives the answer instantly for any value.
To convert joule (J) to BTU (BTU), multiply the value in joules by 0.0009478171.
BTU = J × 0.0009478171
- 1
Take the value in joules
For example, 25 J.
- 2
Multiply by 0.0009478171
25 × 0.0009478171.
- 3
Read the answer in BTUs
25 J = 0.02369543 BTU.
Joule to BTU conversion table
Common values from 1 to 1,000 joules converted to BTUs.
| Joule (J) | BTU (BTU) |
|---|---|
| 1 J | 0.00094782 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 |
| 15 J | 0.01421726 BTU |
| 20 J | 0.01895634 BTU |
| 25 J | 0.02369543 BTU |
| Joule (J) | BTU (BTU) |
|---|---|
| 30 J | 0.02843451 BTU |
| 40 J | 0.03791268 BTU |
| 50 J | 0.04739086 BTU |
| 60 J | 0.05686903 BTU |
| 70 J | 0.0663472 BTU |
| 75 J | 0.07108628 BTU |
| 80 J | 0.07582537 BTU |
| 90 J | 0.08530354 BTU |
| 100 J | 0.09478171 BTU |
| 250 J | 0.23695428 BTU |
| 500 J | 0.47390856 BTU |
| 1,000 J | 0.94781712 BTU |
About joules and BTUs
Joule (J)
The joule (J) is the SI unit of energy: the work done by a force of one newton over one meter. One watt is one joule per second.
BTU (BTU)
A British thermal unit (BTU) is about 1,055 joules. It is used to rate air conditioners and heaters.
J to BTU: common questions
- How many BTUs are in 1 joule?
- 1 joule (J) is approximately equal to 0.00094782 BTUs (BTU). In short: 1 J ≈ 0.00094782 BTU.
- How do I convert joules to BTUs?
- To convert J to BTU, multiply the value in joules by 0.0009478171. For example, 5 J = 0.00473909 BTU.
- How do I convert BTUs to joules?
- Use the Btu to Joule converter, which applies the exact reverse factor.
- What is 10 J in BTU, and what is 100 J?
- 10 J = 0.00947817 BTU, and 100 J = 0.09478171 BTU. The table above lists more values from 1 to 1,000.
- Is this J to BTU converter accurate?
- Yes. It uses the exact conversion factor and shows results to as many as 8 decimal places, so you can rely on it for study, work and everyday measuring.
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