Joules to BTU
Convert joules (J) to btu (BTU) instantly — with formula and reference table.
J
BTU
Quick answer: 1 J = 0.000948 BTU. To convert joules to btu, multiply by J × 0.000948.
Converting joules to btu
This converter changes a value in joules (J) into btu (BTU). One joule equals 0.000948 BTU. One BTU equals 1,055.06 joules, so converting joules to BTU means dividing by 1,055.06. The conversion runs entirely in your browser — enter a value and the result updates instantly, in either direction.
Formula
BTU = J × 0.000948
Example
Convert 10 J to BTU: 10 × 0.000948 = 0.009478 BTU.
Joules to BTU conversion table
| Joules (J) | BTU (BTU) |
|---|---|
| 1 J | 0.000948 BTU |
| 2 J | 0.001896 BTU |
| 3 J | 0.002843 BTU |
| 5 J | 0.004739 BTU |
| 10 J | 0.009478 BTU |
| 20 J | 0.018956 BTU |
| 25 J | 0.023695 BTU |
| 50 J | 0.047391 BTU |
| 100 J | 0.094782 BTU |
How to use this converter
- Enter a value in the joules (J) field.
- Read the converted value in btu (BTU) below.
- Type into the BTU field instead to convert in reverse, or use the swap button.
Frequently asked questions
How many BTU is 1,000 joules?
1,000 joules equals 0.948 BTU.
How do I convert 5,000 J to BTU?
5,000 times 0.000947817 = 4.74 BTU.
How many joules in a BTU?
1 BTU equals 1,055.06 joules.