📏 BTUs to Kilocalories Converter
Convert btus (BTU) to kilocalories (kcal) instantly, with the formula, a worked example and a conversion table.
Quick answer: 1 btu (BTU) = 0.2521644 kilocalories (kcal). Formula: kcal = BTU × 0.2521644.
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BTUs to Kilocalories Converter inputs
Result
BTUs to Kilocalories conversion table
| BTUs (BTU) | Kilocalories (kcal) |
|---|---|
| 0.1 BTU | 0.02521644 kcal |
| 0.5 BTU | 0.1260822 kcal |
| 1 BTU | 0.2521644 kcal |
| 2 BTU | 0.5043288 kcal |
| 3 BTU | 0.7564932 kcal |
| 5 BTU | 1.260822 kcal |
| 10 BTU | 2.521644 kcal |
| 20 BTU | 5.043288 kcal |
| 25 BTU | 6.30411 kcal |
| 50 BTU | 12.60822 kcal |
| 100 BTU | 25.21644 kcal |
| 1,000 BTU | 252.1644 kcal |
Other energy conversions
How to convert btus to kilocalories
Multiply the number of btus by 0.2521644 to get kilocalories: kcal = BTU × 0.2521644.
Example: 5 BTU = 1.260822 kcal.
The btu (BTU) and the kilocalorie (food calorie) (kcal) are both units of energy. Need the opposite direction? Use the kcal to BTU converter.
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Metric and imperial units
The metric system (SI) is used by almost every country and by science worldwide. Its units scale by powers of ten – 1 kilometer is 1,000 meters, 1 meter is 100 centimeters – which makes conversions inside the system easy. The imperial and US customary systems (inches, feet, pounds, gallons) are still used daily in the United States and partly in the UK.
Since 1959 the inch has been defined as exactly 2.54 centimeters and the pound as exactly 0.45359237 kilograms, so conversions between the two systems are exact. Note that a US gallon (3.785 L) and an imperial gallon (4.546 L) are different – choose the right one above.
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Frequently asked questions
How many kilocalories are in a btu?
1 btu = 0.2521644 kilocalories.
How do I convert btus to kilocalories?
Use the formula kcal = BTU × 0.2521644. For example, 5 BTU = 1.260822 kcal.
How do I convert kilocalories back to btus?
1 kilocalorie (food calorie) = 3.9656668 btus. Use the kcal to BTU converter linked on this page.
Are these conversions exact?
Yes – all factors use the internationally defined values (for example 1 inch = 2.54 cm exactly, 1 pound = 0.45359237 kg exactly). Results are rounded to 8 significant digits for display.