Calories to British thermal units
1 calorie in British thermal units
1 cal = 0.0039657 BTU
BTU = cal × 0.003965666831
To convert calories to British thermal units, multiply by 0.003965666831. The table below gives the values people look up most often, and the converter works for any number.
Calories to British thermal units table
| Calories | British thermal units |
|---|---|
| 1 cal | 0.0039657 |
| 2 cal | 0.0079313 |
| 3 cal | 0.011897 |
| 4 cal | 0.015863 |
| 5 cal | 0.019828 |
| 10 cal | 0.039657 |
| 15 cal | 0.059485 |
| 20 cal | 0.079313 |
| 25 cal | 0.099142 |
| 30 cal | 0.11897 |
| 40 cal | 0.15863 |
| 50 cal | 0.19828 |
| 75 cal | 0.29743 |
| 100 cal | 0.39657 |
| 250 cal | 0.99142 |
| 500 cal | 1.982833 |
| 1,000 cal | 3.965667 |
How the conversion works
The relationship is BTU = cal × 0.003965666831. Both units measure energy, so the conversion is a fixed factor that never changes.
Calorie: Thermochemical (small) calorie.
Common questions
- How many British thermal units are in one calorie?
- One calorie equals 0.0039657 British thermal units. BTU = cal × 0.003965666831.
- How do you convert calories to British thermal units?
- Use BTU = cal × 0.003965666831. So 10 cal is 0.039657 BTU.
- How many calories are in one British thermal unit?
- One British thermal unit equals 252.1644 calories, which is the reverse of the conversion above.
- Is there more than one kind of calorie?
- Thermochemical (small) calorie.
Related pages
Sources
- Guide for the Use of the International System of Units (SP 811) — NIST (Public domain (US Government))
- The International System of Units (SI Brochure) — Bureau International des Poids et Mesures
- Calculated on this page — At One Place