ACCURATE CONVERSION
Calories to British thermal units Converter
Convert calories (cal) to British thermal units (BTU) with a standards-based formula.
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To
How to convert calories to British thermal units
Enter a value in the converter above. The result updates immediately using the relationship below.
FORMULA1 calorie = 0.00396567 British thermal units
Calories to British thermal units conversion table
| Calories (cal) | British thermal units (BTU) |
|---|---|
| 1 | 0.00396567 |
| 5 | 0.01982833 |
| 10 | 0.03965667 |
| 20 | 0.07931334 |
| 50 | 0.19828334 |
| 100 | 0.39656668 |
Common values
For a quick estimate, multiply by the factor above. Use more decimal places when technical work requires additional precision.
Frequently asked questions
How many British thermal units are in one calorie?
One calorie equals 0.00396567 British thermal units.
How do you convert calories to British thermal units?
Multiply the calorie value by 0.00396567.
Can I convert British thermal units back to calories?
Yes. One British thermal unit equals 252.16440072 calories; you can also use the swap button.