Convert BTU to kilocalories
1 BTU = 0.2521644 kcal. Change the amount below, or read the formula and the reference table further down.
1 BTU equals
kilocalories
1 BTU = 0.2521644 kcal
The formula
BTU and kilocalories both measure energy from the same zero, so a single multiplier does the job.
kcal = BTU × 0.2521644007
Going the other way? Convert kilocalories to BTU.
BTU to kilocalories table
Common values, rounded for reading.
| BTU (BTU) | Kilocalories (kcal) |
|---|---|
| 1 | 0.252164 |
| 2 | 0.504329 |
| 3 | 0.756493 |
| 4 | 1.0087 |
| 5 | 1.2608 |
| 6 | 1.513 |
| 7 | 1.7652 |
| 8 | 2.0173 |
| 9 | 2.2695 |
| 10 | 2.5216 |
| 15 | 3.7825 |
| 20 | 5.0433 |
| 25 | 6.3041 |
| 30 | 7.5649 |
| 40 | 10.0866 |
| 50 | 12.6082 |
| 75 | 18.9123 |
| 100 | 25.2164 |
| 250 | 63.0411 |
| 500 | 126.08 |
| 1,000 | 252.16 |
Questions people ask
- How many kilocalories are in a BTU?
- One BTU equals 0.2521644007 kilocalories.
- How do I convert BTU to kilocalories by hand?
- Multiply the number of BTU by 0.2521644007. For a rough check, 0.252 is close enough for most everyday use.
- What is 1 BTU in kilocalories?
- 1 BTU is 0.2521644 kilocalories.
Calcuit generates this page from a unit table, so the factors here match every other page on the site.