Convert BTU to joules
1 BTU = 1,055.06 J. Change the amount below, or read the formula and the reference table further down.
1 BTU equals
joules
1 BTU = 1,055.06 J
The formula
BTU and joules both measure energy from the same zero, so a single multiplier does the job.
J = BTU × 1,055.06
Going the other way? Convert joules to BTU.
BTU to joules table
Common values, rounded for reading.
| BTU (BTU) | Joules (J) |
|---|---|
| 1 | 1,055.06 |
| 2 | 2,110.11 |
| 3 | 3,165.17 |
| 4 | 4,220.22 |
| 5 | 5,275.28 |
| 6 | 6,330.34 |
| 7 | 7,385.39 |
| 8 | 8,440.45 |
| 9 | 9,495.5 |
| 10 | 10,550.56 |
| 15 | 15,825.84 |
| 20 | 21,101.12 |
| 25 | 26,376.4 |
| 30 | 31,651.68 |
| 40 | 42,202.23 |
| 50 | 52,752.79 |
| 75 | 79,129.19 |
| 100 | 105,505.59 |
| 250 | 263,763.96 |
| 500 | 527,527.93 |
| 1,000 | 1,055,055.85 |
Questions people ask
- How many joules are in a BTU?
- One BTU equals 1,055.06 joules.
- How do I convert BTU to joules by hand?
- Multiply the number of BTU by 1,055.06. For a rough check, 1,055.06 is close enough for most everyday use.
- What is 1 BTU in joules?
- 1 BTU is 1,055.06 joules.
Calcuit generates this page from a unit table, so the factors here match every other page on the site.