100 calories to BTU
100 cal = 0.39656668 BTU. Change the amount below, or read the formula and the reference table further down.
100 calories equals
BTU
1 cal = 0.00396567 BTU
The formula
Calories and BTU both measure energy from the same zero, so a single multiplier does the job.
BTU = cal × 0.0039656668
Going the other way? Convert BTU to calories.
Calories to BTU table
Values either side of 100 cal.
| Calories (cal) | BTU (BTU) |
|---|---|
| 0 | 0 |
| 10 | 0.039657 |
| 20 | 0.079313 |
| 30 | 0.11897 |
| 40 | 0.158627 |
| 50 | 0.198283 |
| 60 | 0.23794 |
| 70 | 0.277597 |
| 80 | 0.317253 |
| 90 | 0.35691 |
| 100 | 0.396567 |
| 110 | 0.436223 |
| 120 | 0.47588 |
| 130 | 0.515537 |
| 140 | 0.555193 |
| 150 | 0.59485 |
| 160 | 0.634507 |
| 170 | 0.674163 |
| 180 | 0.71382 |
| 190 | 0.753477 |
| 200 | 0.793133 |
Questions people ask
- How many BTU are in a calorie?
- One calorie equals 0.0039656668 BTU.
- How do I convert calories to BTU by hand?
- Multiply the number of calories by 0.0039656668. For a rough check, 0.004 is close enough for most everyday use.
- What is 100 calories in BTU?
- 100 calories is 0.39656668 BTU.
Calcuit generates this page from a unit table, so the factors here match every other page on the site.