Convert BTU to calories
British thermal units to calories. Enter a value to convert, or use the BTU to calories chart further down the page.
1 British thermal unit equals 252.164 calories. Going the other way, 1 calorie = 0.00396567 British thermal units.
How to convert BTU to calories
To convert British thermal units to calories, multiply the British thermal unit value by 252.1644007. You can also divide by 0.003965666831 to get the same answer.
cal = BTU × 252.1644007
Worked example
Convert 15 BTU to calories:
15 BTU = 3,782.47 cal
BTU to calories conversion chart
Use this BTU to calories table for quick reference without typing anything.
| British thermal units (BTU) | calories (cal) |
|---|---|
| 0.01 BTU | 2.52164 cal |
| 0.1 BTU | 25.2164 cal |
| 1 BTU | 252.164 cal |
| 2 BTU | 504.329 cal |
| 3 BTU | 756.493 cal |
| 5 BTU | 1,260.82 cal |
| 10 BTU | 2,521.64 cal |
| 20 BTU | 5,043.29 cal |
| 50 BTU | 12,608.2 cal |
| 100 BTU | 25,216.4 cal |
| 1,000 BTU | 252,164 cal |
What is a British thermal unit?
The BTU is the energy needed to raise one pound of water by one degree Fahrenheit — about 1,055 joules. It rates heating and air-conditioning equipment in the US.
What is a calorie?
The thermochemical calorie is defined as exactly 4.184 joules. Note that the “calories” on food labels are actually kilocalories.
Frequently asked questions
How many calories are in a British thermal unit?
1 BTU equals 252.164 calories. Going the other way, 1 calories is 0.00396567 BTU.
How do you convert BTU to calories?
To convert British thermal units to calories, multiply the British thermal unit value by 252.1644007. You can also divide by 0.003965666831 to get the same answer.
What is 10 BTU in calories?
10 BTU equals 2,521.64 calories. The conversion chart on this page lists the other values people look up most often.
Related energy conversions
Convert BTU to other units
- calories to BTU
- BTU to joules
- BTU to kilojoules
- BTU to kilocalories
- BTU to kWh
- BTU to Wh
- BTU to foot pounds
Convert other units to calories
- joules to calories
- kilojoules to calories
- kilocalories to calories
- kWh to calories
- Wh to calories
- foot pounds to calories
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