Convert Joule to British Thermal Unit
1 joule = 0.0009478171 british thermal unit (BTU). For example, 10 joule = 0.009478171 british thermal unit and 100 joule = 0.09478171 british thermal unit. Type any value below to convert joule to british thermal unit both ways — it runs entirely in your browser.
Joule to British Thermal Unit conversion formula
To convert joule to british thermal unit, multiply by 0.0009478171:
british thermal unit = joule × 0.0009478171
Going the other way, 1 british thermal unit = 1,055.056 joule, so
joule = british thermal unit × 1,055.056.
Joule to British Thermal Unit — worked examples
| Joule | British Thermal Unit |
|---|---|
| 1 J | 0.0009478171 BTU |
| 2 J | 0.001895634 BTU |
| 3 J | 0.002843451 BTU |
| 5 J | 0.004739086 BTU |
| 10 J | 0.009478171 BTU |
| 25 J | 0.02369543 BTU |
| 50 J | 0.04739086 BTU |
| 100 J | 0.09478171 BTU |
Joule ↔ British Thermal Unit reference table
| Joule → British Thermal Unit | British Thermal Unit → Joule |
|---|---|
| 1 J = 0.0009478171 BTU | 1 BTU = 1,055.056 J |
| 2 J = 0.001895634 BTU | 2 BTU = 2,110.112 J |
| 5 J = 0.004739086 BTU | 5 BTU = 5,275.279 J |
| 10 J = 0.009478171 BTU | 10 BTU = 10,550.56 J |
| 20 J = 0.01895634 BTU | 20 BTU = 21,101.12 J |
| 50 J = 0.04739086 BTU | 50 BTU = 52,752.79 J |
| 100 J = 0.09478171 BTU | 100 BTU = 105,505.6 J |
| 250 J = 0.2369543 BTU | 250 BTU = 263,764 J |
| 500 J = 0.4739086 BTU | 500 BTU = 527,527.9 J |
| 1000 J = 0.9478171 BTU | 1000 BTU = 1,055,056 J |
About joule and british thermal unit
Joule: The joule is the SI unit of energy — the work done by a force of one newton acting over one metre (1 J = 1 N·m), and also one watt-second.
British Thermal Unit: A British thermal unit is roughly the heat needed to raise one pound of water by 1 °F — about 1,055.06 J (the International Table BTU). Common in heating, cooling (AC tonnage) and US energy work.
Frequently asked questions
- How many british thermal unit are in 1 joule?
- 1 joule = 0.0009478171 british thermal unit (BTU).
- How do I convert joule to british thermal unit?
- Multiply the number of joule by 0.0009478171. For example, 10 joule = 10 × 0.0009478171 = 0.009478171 british thermal unit.
- How many joule are in 1 british thermal unit?
- 1 british thermal unit = 1,055.056 joule.
- Which is bigger, joule or british thermal unit?
- 1 british thermal unit equals 1,055.056 joule, so a british thermal unit is the larger unit.