Convert Btu to Joule - Free Calculator
Fast, accurate energy conversion calculator. Convert btu to joule instantly with precise results.
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How to Convert Btu to Joule
Use this free online calculator to convert Btu to Joule instantly. This energy conversion tool provides accurate results for all your measurement needs.
Quick Reference
Btu to Joule Conversion Formula
To convert Btu to Joule, multiply by 1,055.06.
To convert Joule back to Btu, divide by 1,055.06 (or multiply by 0.000947817).
About These Units
About Btu
The Btu is a unit of heat energy defined as the amount of heat required to raise the temperature of one pound of water by one degree Fahrenheit. In America the British thermal unit is sometimes called the heat unit. In defining the Btu, it is necessary to specify the temperature of the water; thus there have been several definitions over the years. However, one Btu is equal to about 251.996 (small) calories, or 0.251 996 of the (kilo-)calories counted by dieters. Using the current definition of the calorie (the IT calorie), one Btu equals approximately 778.169 foot pounds, 1.055 056 kilojoules or 0.293 071 watt hour. The symbol BThU has also been used, especially in Britain.
About Joule
The joule is a unit of energy used to measure work, heat, or power in various scientific and engineering contexts.
Btu to Joule Conversion Table
| Btu | Joule | Joule | Btu |
|---|---|---|---|
| 0.1 | 105.506 | 0.1 | 0.0000947817 |
| 0.5 | 527.528 | 0.5 | 0.000473909 |
| 1 | 1,055.06 | 1 | 0.000947817 |
| 2 | 2,110.11 | 2 | 0.00189563 |
| 5 | 5,275.28 | 5 | 0.00473909 |
| 10 | 10,550.6 | 10 | 0.00947817 |
| 20 | 21,101.1 | 20 | 0.0189563 |
| 25 | 26,376.4 | 25 | 0.0236954 |
| 50 | 52,752.8 | 50 | 0.0473909 |
| 100 | 105,506 | 100 | 0.0947817 |
| 250 | 263,764 | 250 | 0.236954 |
| 500 | 527,528 | 500 | 0.473909 |
| 1000 | 1,055,060 | 1000 | 0.947817 |
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