BTU to Kilocalories Converter
How to convert BTU to kilocalories
kilocalories = BTU ÷ 3.96566683
To convert BTU to kilocalories, divide the number of BTU by 3.96566683.
1 BTU = 0.252164401 kcal
Examples
- 1,000 BTU ÷ 3.96566683 = 252.164401 kcal
- About one therm: 100,000 BTU ÷ 3.96566683 = 25,216.4401 kcal
Good to know
This is the International Table BTU, 1055.05585262 J. Other definitions exist, such as the thermochemical BTU (about 1054.35 J); they differ from it by up to about 0.5%.
The kilocalorie is the food "Calorie" (capital C) shown on nutrition labels. It is based here on the thermochemical calorie, so 1 kcal is exactly 4.184 kJ.
BTU to kilocalories conversion table
| BTU | Kilocalories (kcal) |
|---|---|
| 1 BTU | 0.252164401 kcal |
| 10 BTU | 2.52164401 kcal |
| 100 BTU | 25.2164401 kcal |
| 500 BTU | 126.0822 kcal |
| 1,000 BTU | 252.164401 kcal |
| 2,000 BTU | 504.328801 kcal |
| 5,000 BTU | 1,260.822 kcal |
| 10,000 BTU | 2,521.64401 kcal |
| 12,000 BTU | 3,025.97281 kcal |
| 20,000 BTU | 5,043.28801 kcal |
| 50,000 BTU | 12,608.22 kcal |
| 100,000 BTU | 25,216.4401 kcal |
| 500,000 BTU | 126,082.2 kcal |
| 1,000,000 BTU | 252,164.401 kcal |
Unit definitions
- BTU
- The British thermal unit is roughly the heat needed to raise one pound of water by one degree Fahrenheit. The International Table BTU is exactly 1055.05585262 joules, and it is used for heating and cooling in the United States.
- Kilocalorie (kcal)
- A kilocalorie is 1000 calories, exactly 4184 joules using the thermochemical calorie. It is the unit of food energy on nutrition labels.