Btus to Calories Converter
Convert British thermal unit to calorie instantly. Type a value below — the result updates as you type.
When you need to convert British thermal unit to calorie
Energy conversions appear on nutrition labels, utility bills and appliance specs, letting you compare food energy, electricity use and heating output on a common scale.
Typical values: 0.5 BTU is about 126.0822 cal, and 5 BTU works out to roughly 1260.82 cal. Because the ratio is fixed at 252.1644, you can scale any amount linearly — doubling the BTUs doubles the calories.
Food packaging, power meters and heating equipment each prefer different energy units, so converting makes them directly comparable.
How to convert British thermal unit to calorie
One British thermal unit equals 252.1644 calories. To convert, multiply the number of BTUs by 252.1644:
calories = BTUs × 252.1644
For example, 10 BTUs × 252.1644 = 2521.64 calories.
Btus to calories conversion table
| Energy (BTU) | Calories (cal) |
|---|---|
| 1 BTU | 252.1644 cal |
| 2 BTU | 504.3288 cal |
| 3 BTU | 756.4932 cal |
| 5 BTU | 1260.82 cal |
| 10 BTU | 2521.64 cal |
| 20 BTU | 5043.29 cal |
| 50 BTU | 12608.2 cal |
| 100 BTU | 25216.4 cal |
FAQ
How many calories are in a British thermal unit?
One British thermal unit = 252.1644 calories.
How do I convert calories back to BTUs?
Divide by 252.1644, or use the calories to BTUs converter.