How to convert BTU to joules
To convert BTU to joules, multiply the value by the conversion factor 1,055.06. To go the other way, multiply by 0.0009478171 (or divide by 1,055.06).
Worked example: 25 BTU to J
- Write the value: 25 BTU
- Multiply by 1,055.06: 25 × 1,055.06
- Result: 26,376.4 J
BTU to Joule conversion table
Quick reference values, rounded to 6 significant digits.
| BTU (BTU) | Joule (J) |
|---|---|
| 0.001 BTU | 1.05506 J |
| 0.005 BTU | 5.27528 J |
| 0.01 BTU | 10.5506 J |
| 0.05 BTU | 52.7528 J |
| 0.1 BTU | 105.506 J |
| 0.25 BTU | 263.764 J |
| 0.5 BTU | 527.528 J |
| 1 BTU | 1,055.06 J |
| 2 BTU | 2,110.11 J |
| 3 BTU | 3,165.17 J |
| 5 BTU | 5,275.28 J |
| 10 BTU | 10,550.56 J |
| 20 BTU | 21,101.12 J |
| 50 BTU | 52,752.79 J |
| 100 BTU | 105,506 J |
Joule to BTU
| J | BTU |
|---|---|
| 1 J | 0.000947817 BTU |
| 5 J | 0.00473909 BTU |
| 10 J | 0.00947817 BTU |
| 50 J | 0.0473909 BTU |
| 100 J | 0.0947817 BTU |
1 BTU in other energy units
About BTU and Joule
What is a btu (BTU)?
A British Thermal Unit is the energy to heat one pound of water by 1 °F.
What is a joule (J)?
The joule is the SI unit of energy.
Where btu to joule conversion is used
Energy conversions are needed for electricity bills, food calories, heating, batteries and physics. Converting between BTU and joules is especially common when you compare products, read foreign specifications, or fill in forms that expect a specific unit.
Need every unit at once? Use the full Energy Converter.
Frequently asked questions
How many joules are in 1 btu?
1 BTU equals 1,055.06 J.
How do I convert BTU to joules?
Multiply the number of BTU by 1,055.06. For example, 25 BTU × 1,055.06 = 26,376.4 J.
What is 25 BTU in J?
25 BTU = 26,376.4 J.
How many BTU are in 1 joule?
1 Joule equals 0.000947817 BTU. Use the Joules to BTU converter for the reverse direction.
Is this BTU to Joule converter accurate?
Yes. It uses exact internationally defined conversion factors, calculated with full floating-point precision. Results are displayed rounded for readability.