📏 Kilocalories to BTUs Converter
Convert kilocalories (kcal) to btus (BTU) instantly, with the formula, a worked example and a conversion table.
Quick answer: 1 kilocalorie (food calorie) (kcal) = 3.9656668 btus (BTU). Formula: BTU = kcal × 3.9656668.
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Kilocalories to BTUs Converter inputs
Result
1 kcal =
3.9656668 BTU
BTU = kcal × 3.9656668
1 kilocalorie (food calorie) = 3.9656668 BTU · BTU to kcal
Kilocalories to BTUs conversion table
| Kilocalories (kcal) | BTUs (BTU) |
|---|---|
| 0.1 kcal | 0.39656668 BTU |
| 0.5 kcal | 1.9828334 BTU |
| 1 kcal | 3.9656668 BTU |
| 2 kcal | 7.9313337 BTU |
| 3 kcal | 11.897 BTU |
| 5 kcal | 19.828334 BTU |
| 10 kcal | 39.656668 BTU |
| 20 kcal | 79.313337 BTU |
| 25 kcal | 99.141671 BTU |
| 50 kcal | 198.28334 BTU |
| 100 kcal | 396.56668 BTU |
| 1,000 kcal | 3,965.6668 BTU |
Other energy conversions
How to convert kilocalories to btus
Multiply the number of kilocalories by 3.9656668 to get btus: BTU = kcal × 3.9656668.
Example: 5 kcal = 19.828334 BTU.
The kilocalorie (food calorie) (kcal) and the btu (BTU) are both units of energy. Need the opposite direction? Use the BTU to kcal 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 btus are in a kilocalorie (food calorie)?
1 kilocalorie (food calorie) = 3.9656668 btus.
How do I convert kilocalories to btus?
Use the formula BTU = kcal × 3.9656668. For example, 5 kcal = 19.828334 BTU.
How do I convert btus back to kilocalories?
1 btu = 0.2521644 kilocalories. Use the BTU to kcal 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.