Convert joules to BTU and BTU to joules instantly. Bidirectional energy converter with formula and common values.
Multiply the joule value by 0.000947817 to get British Thermal Units. The BTU is a traditional unit of heat used extensively in the US for HVAC systems, furnaces, and natural gas billing.
| Joules | BTU |
|---|---|
| 1,055 | 1.000 |
| 5,275 | 5.000 |
| 10,551 | 10.00 |
| 52,753 | 50.00 |
| 105,506 | 100.0 |
| 527,530 | 500.0 |
| 1,055,060 | 1,000 |
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One joule equals approximately 0.000947817 BTU. Joules are much smaller than BTU, so large joule values produce modest BTU numbers.
Multiply the joule value by 0.000947817, or divide by 1,055.06. For example, 5,275 J × 0.000947817 = 5.0 BTU.
This conversion is common when translating scientific energy measurements (in SI joules) into HVAC and heating industry terms (BTU), particularly for US-based engineering specifications.
The International Table BTU equals exactly 1,055.05585262 joules. The commonly used rounded value is 1,055.06 J per BTU.