Btu to Joules
1 btu = 1055.06 joules (J)
Convert btu to joules instantly. 1 btu = 1055.06 joules. Free, accurate, with conversion table and formula.
BTU (BTU)
Joule (J)
| Unit | 1 BTU equals |
|---|---|
| Joule (J) | 1,055.06 |
| Kilojoule (kJ) | 1.05506 |
| Calorie (cal) | 252.165 |
| Kilocalorie (kcal) | 0.252165 |
| Watt Hour (Wh) | 0.293072 |
| Kilowatt Hour (kWh) | 0.000293072 |
| BTU (BTU) | 1 |
| Electron Volt (eV) | 6.58517e+21 |
| Foot-Pound (ft·lb) | 778.171 |
How to convert btu to joules
- 1Take your value in btu (BTU).
- 2Multiply by 1055.06.
- 3The result is your value in joules (J).
Btu to Joules conversion table
| Btu (BTU) | Joules (J) |
|---|---|
| 1 | 1,055.06 |
| 2 | 2,110.12 |
| 5 | 5,275.3 |
| 10 | 10,550.6 |
| 25 | 26,376.5 |
| 50 | 52,753 |
| 100 | 105,506 |
| 250 | 263,765 |
| 500 | 527,530 |
| 1,000 | 1.05506e+6 |
Frequently asked
How many joules are in a btu?
1 btu equals 1055.06 joules (J).
How do I convert btu to joules?
Multiply the number of btu by 1055.06 to get joules.
What is 10 btu in joules?
10 BTU equals 1.055e+4 J.
What is 100 btu in joules?
100 BTU equals 1.055e+5 J.
How do I convert joules back to btu?
Multiply joules by 0.000947813 (the reciprocal) or use the swap button above.
Where you'll actually use this
Energy converters bridge joules, calories, kilowatt-hours, BTUs, and electron-volts — the same physical quantity expressed for science, nutrition, electricity, or HVAC.
- Electricity bills
Usage is billed in kWh. Convert to joules for physics, or to BTU for HVAC comparisons.
- Nutrition
Food 'calories' are actually kilocalories (kcal). 1 kcal = 4,184 J. EU labels list both kcal and kJ.
- HVAC & cooling
Air conditioner output is quoted in BTU/h in the US, watts elsewhere.
Common mistakes to avoid
- Calories vs kilocalories
When a food label says '250 calories' it really means 250 kcal = 250,000 small calories.
- kW vs kWh
kW is power (rate); kWh is energy (total). A 1 kW heater running for 2 hours uses 2 kWh.
Did you know?
A typical modern fridge uses about 1 kWh per 24 hours — roughly $0.10–$0.30 depending on local rates.
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