Convert kilocalories to British thermal units
Kilocalorie (kcal) to British thermal unit (BTU). One kilocalorie equals 3.9657 British thermal units.
Formula
Kilocalorie to British thermal unit conversion table
| Kilocalories | British thermal units | British thermal units | Kilocalories |
|---|---|---|---|
| 1 kcal | 3.9657 BTU | 1 BTU | 0.252164 kcal |
| 2 kcal | 7.9313 BTU | 2 BTU | 0.504329 kcal |
| 3 kcal | 11.897 BTU | 3 BTU | 0.756493 kcal |
| 5 kcal | 19.8283 BTU | 5 BTU | 1.2608 kcal |
| 10 kcal | 39.6567 BTU | 10 BTU | 2.5216 kcal |
| 20 kcal | 79.3133 BTU | 20 BTU | 5.0433 kcal |
| 50 kcal | 198.28 BTU | 50 BTU | 12.6082 kcal |
| 100 kcal | 396.57 BTU | 100 BTU | 25.2164 kcal |
| 500 kcal | 1982.83 BTU | 500 BTU | 126.08 kcal |
| 1000 kcal | 3965.67 BTU | 1000 BTU | 252.16 kcal |
To convert kilocalories to British thermal units, multiply the number of kilocalories by 3.9657. One kilocalorie equals 3.9657 British thermal units, and one British thermal unit equals 0.252164 kilocalories, so the relationship is fixed and exact. As a worked example, 10 kcal comes to 39.6567 BTU. Enter your own figure in the converter above to get an instant answer, or use the swap button to flip the direction. This is a energy conversion, and like every tool on UnitGlide it runs locally in your browser with no account or upload required. The table further down shows a range of common kilocalorie values already worked out in British thermal units, plus the reverse British thermal unit to kilocalorie direction, which is handy for quick reference or double-checking a result by hand.
Frequently asked questions
How many British thermal units are in a kilocalorie?
One kilocalorie equals 3.9657 British thermal units. The ratio is constant, so you can multiply any number of kilocalories by 3.9657 to get British thermal units.
What is the formula to convert kilocalories to British thermal units?
Use British thermal units = kilocalories × 3.9657. UnitGlide applies this exact formula for every value, so results stay accurate across the whole range.
How do I convert British thermal units back to kilocalories?
Go the other way by using one British thermal unit equals 0.252164 kilocalories. You can also press the swap button in the converter above to flip the direction in one click.
Is this kilocalorie to British thermal unit converter accurate?
Yes. It uses internationally defined SI conversion factors, as maintained by the BIPM, and all math runs in your browser so nothing is rounded away on a server. For everyday use the displayed precision is more than enough.