25 calories to BTU
25 cal = 0.09914167 BTU. Change the amount below, or read the formula and the reference table further down.
25 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 25 cal.
| Calories (cal) | BTU (BTU) |
|---|---|
| 15 | 0.059485 |
| 16 | 0.063451 |
| 17 | 0.067416 |
| 18 | 0.071382 |
| 19 | 0.075348 |
| 20 | 0.079313 |
| 21 | 0.083279 |
| 22 | 0.087245 |
| 23 | 0.09121 |
| 24 | 0.095176 |
| 25 | 0.099142 |
| 26 | 0.103107 |
| 27 | 0.107073 |
| 28 | 0.111039 |
| 29 | 0.115004 |
| 30 | 0.11897 |
| 31 | 0.122936 |
| 32 | 0.126901 |
| 33 | 0.130867 |
| 34 | 0.134833 |
| 35 | 0.138798 |
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 25 calories in BTU?
- 25 calories is 0.09914167 BTU.
Calcuit generates this page from a unit table, so the factors here match every other page on the site.