Convert Joules to British Thermal Units
1 joule = 0.0009478171 British thermal units. Type any value below to convert in either direction — the calculation happens in your browser.
Joules to British Thermal Units formula
Multiply the number of joules by 0.0009478171 to get British thermal units.
British thermal units = joules × 0.0009478171To go the other way: divide the number of British thermal units by 0.0009478171, or multiply by 1055.056.
joules = British thermal units ÷ 0.0009478171Joules to British Thermal Units conversion table
| Joules | British Thermal Units |
|---|---|
| 1 J | 0.0009478171 BTU |
| 2 J | 0.001895634 BTU |
| 3 J | 0.002843451 BTU |
| 4 J | 0.003791268 BTU |
| 5 J | 0.004739086 BTU |
| 6 J | 0.005686903 BTU |
| 7 J | 0.00663472 BTU |
| 8 J | 0.007582537 BTU |
| 9 J | 0.008530354 BTU |
| 10 J | 0.009478171 BTU |
| 15 J | 0.01421726 BTU |
| 20 J | 0.01895634 BTU |
| 25 J | 0.02369543 BTU |
| 30 J | 0.02843451 BTU |
| 40 J | 0.03791268 BTU |
| 50 J | 0.04739086 BTU |
| 75 J | 0.07108628 BTU |
| 100 J | 0.09478171 BTU |
| 250 J | 0.2369543 BTU |
| 500 J | 0.4739086 BTU |
| 1,000 J | 0.9478171 BTU |
British Thermal Units to Joules conversion table
| British Thermal Units | Joules |
|---|---|
| 1 BTU | 1,055.056 J |
| 2 BTU | 2,110.112 J |
| 3 BTU | 3,165.168 J |
| 4 BTU | 4,220.223 J |
| 5 BTU | 5,275.279 J |
| 6 BTU | 6,330.335 J |
| 7 BTU | 7,385.391 J |
| 8 BTU | 8,440.447 J |
| 9 BTU | 9,495.503 J |
| 10 BTU | 10,550.56 J |
About the joule
The joule is the SI unit of energy — the work done by one newton acting over one metre.
About the British thermal unit
A BTU is the energy needed to raise one pound of water by one degree Fahrenheit, about 1,055 joules.
Frequently asked questions
How many British thermal units are in a joule?
There are 0.0009478171 British thermal units in one joule.
How many joules are in a British thermal unit?
There are 1,055.056 joules in one British thermal unit.
Is this conversion exact?
The ratio between the joule and the British thermal unit is fixed by definition, so the conversion is exact — the figures shown here are rounded for readability only.
What is 10 joules in British thermal units?
10 joules equals 0.009478171 British thermal units.
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