Convert British Thermal Units to Calories
1 British thermal unit = 252.164401 calories. Type any value below to convert in either direction — the calculation happens in your browser.
British Thermal Units to Calories formula
Multiply the number of British thermal units by 252.164401 to get calories.
calories = British thermal units × 252.164401To go the other way: divide the number of calories by 252.164401, or multiply by 0.003965667.
British thermal units = calories ÷ 252.164401British Thermal Units to Calories conversion table
| British Thermal Units | Calories |
|---|---|
| 1 BTU | 252.164401 cal |
| 2 BTU | 504.328801 cal |
| 3 BTU | 756.493202 cal |
| 4 BTU | 1,008.658 cal |
| 5 BTU | 1,260.822 cal |
| 6 BTU | 1,512.986 cal |
| 7 BTU | 1,765.151 cal |
| 8 BTU | 2,017.315 cal |
| 9 BTU | 2,269.48 cal |
| 10 BTU | 2,521.644 cal |
| 15 BTU | 3,782.466 cal |
| 20 BTU | 5,043.288 cal |
| 25 BTU | 6,304.11 cal |
| 30 BTU | 7,564.932 cal |
| 40 BTU | 10,086.58 cal |
| 50 BTU | 12,608.22 cal |
| 75 BTU | 18,912.33 cal |
| 100 BTU | 25,216.44 cal |
| 250 BTU | 63,041.1 cal |
| 500 BTU | 126,082.2 cal |
| 1,000 BTU | 252,164.4 cal |
Calories to British Thermal Units conversion table
| Calories | British Thermal Units |
|---|---|
| 1 cal | 0.003965667 BTU |
| 2 cal | 0.007931334 BTU |
| 3 cal | 0.011897 BTU |
| 4 cal | 0.01586267 BTU |
| 5 cal | 0.01982833 BTU |
| 6 cal | 0.023794 BTU |
| 7 cal | 0.02775967 BTU |
| 8 cal | 0.03172533 BTU |
| 9 cal | 0.035691 BTU |
| 10 cal | 0.03965667 BTU |
About the British thermal unit
A BTU is the energy needed to raise one pound of water by one degree Fahrenheit, about 1,055 joules.
About the calorie
A thermochemical calorie is exactly 4.184 joules — the energy to heat one gram of water by one degree Celsius.
Frequently asked questions
How many calories are in a British thermal unit?
There are 252.164401 calories in one British thermal unit.
How many British thermal units are in a calorie?
There are 0.003965667 British thermal units in one calorie.
Is this conversion exact?
The ratio between the British thermal unit and the calorie is fixed by definition, so the conversion is exact — the figures shown here are rounded for readability only.
What is 10 British thermal units in calories?
10 British thermal units equals 2,521.644 calories.
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