BTU to joules
Convert btu to joule — instant, free, with the formula shown.
1 BTU=1055.05585 J
How to convert btu to joule
To convert btu to joule, multiply by 1055.05585:
J = BTU × 1055.05585
For example, 10 BTU × 1055.05585 = 10550.5585 J.
BTU to J conversion table
| BTU (BTU) | joules (J) |
|---|---|
| 1 BTU | 1055.05585 J |
| 2 BTU | 2110.1117 J |
| 5 BTU | 5275.27925 J |
| 10 BTU | 10550.5585 J |
| 25 BTU | 26376.39625 J |
| 50 BTU | 52752.7925 J |
| 100 BTU | 105505.585 J |
| 250 BTU | 263763.9625 J |
| 500 BTU | 527527.925 J |
| 1000 BTU | 1055055.85 J |
Other btu conversions
Convert to joule from another unit
BTU to J — frequently asked
How many joules are in 1 btu?
1 btu = 1055.05585 joules (BTU × 1055.05585 = J).
What is the formula to convert btu to joule?
Multiply your btu value by 1055.05585 to get joule.
How do I convert 10 BTU to joules?
10 BTU = 10550.5585 J. For 100 BTU the answer is 105505.585 J. Use the calculator on this page for any other value.
When to convert btu to joule
1Electricity bills (kWh)
2Nutrition labels (kcal / food cal)
3HVAC and heating (BTU, therms)
4Physics and chemistry (J, eV)
Energy conversion — common questions
Is a food calorie the same as a calorie?
No — a food 'Calorie' (capital C) actually means 1 kilocalorie = 1,000 small calories = 4,184 J. Nutrition labels typically write 'cal' meaning kcal.
How many joules in 1 kWh?
1 kWh = 3,600,000 J (3.6 MJ). Because 1 kW × 1 hour = 1,000 W × 3,600 s = 3,600,000 J.
What is a BTU?
British Thermal Unit — the energy required to raise 1 pound of water by 1 °F. 1 BTU ≈ 1,055 J.
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