Convert British Thermal Unit to Joule
Use this free converter to change british thermal units (BTU) into joules (J). British thermal unit and joule both measure energy. As a quick reference, 1 BTU equals 1055.0558 J, and 1 J equals 0.00094781712 BTU.
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Joule (J)
1055.0558
1 BTU = 1055.0558 J
Energy conversion table
| British Thermal Unit | Joule |
|---|---|
| 0.01 | 10.550558 |
| 0.1 | 105.50558 |
| 0.5 | 527.52792 |
| 1 | 1055.0558 |
| 2 | 2110.1117 |
| 3 | 3165.1676 |
| 5 | 5275.2792 |
| 10 | 10550.558 |
| 20 | 21101.117 |
| 25 | 26376.396 |
| 50 | 52752.792 |
| 100 | 105505.58 |
| 1,000 | 1055055.8 |
How to convert British Thermal Unit to Joule
Multiply the british thermal unit value by 1055.0558 to get joules.
- Enter the number of british thermal units you want to convert.
- The converter instantly shows the equivalent value in joules.
- Worked example: 15 BTU × 1055.0558 = 15825.838 J.
- Use the swap button to reverse the conversion (joule to british thermal unit).
About these units
British Thermal Unit (BTU)
- Definition
- A British thermal unit (BTU) is the energy needed to raise one pound of water by one degree Fahrenheit.
- History
- It developed with steam engineering in Britain and the United States.
- Current use
- BTUs rate heating, air-conditioning, and appliance energy in the US.
Joule (J)
- Definition
- The joule (J) is the SI unit of energy, the work done by a force of one newton over one meter.
- History
- Named after physicist James Prescott Joule, who studied the link between heat and work.
- Current use
- Joules measure energy, work, and heat throughout science and engineering.
Frequently asked questions
How many joules are in a british thermal unit?
There are 1055.0558 J in 1 BTU. To convert, multiply the number of british thermal units by 1055.0558.
How do I convert british thermal units to joules?
Multiply the british thermal unit value by 1055.0558 to get joules. For example, 10 BTU = 10550.558 J.
Is this british thermal unit-to-joule converter free?
Yes. This converter is completely free, runs entirely in your browser, and requires no sign-up. Your inputs never leave your device.
Convert British Thermal Unit to other energy units
| Unit | 1 British Thermal Unit equals |
|---|---|
| Joule (J) | 1055.0558 J |
| Kilojoule (kJ) | 1.0550559 kJ |
| Calorie (cal) | 252.1644 cal |
| Kilocalorie (kcal) | 0.2521644 kcal |
| Watt Hour (Wh) | 0.29307107 Wh |
| Kilowatt Hour (kWh) | 0.00029307107 kWh |
| Electronvolt (eV) | 6.5851e+21 eV |
| Foot-Pound (ft·lb) | 778.16926 ft·lb |