BTU to Calories Converter
Convert British thermal units (BTU) to calories (cal)
Result
252.1644007 cal
Calories
1 BTU = 252.1644007 cal
1 BTU in other units
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How to convert British thermal units to calories
One British thermal unit equals 252.1644 calories, so multiply the number of British thermal units by 252.1644.
cal = BTU × 252.1644
1 BTU = 252.1644 cal · 1 cal = 0.003965667 BTU
Worked example
To convert 5 British thermal units to calories: 5 BTU × 252.1644 = 1,260.822 cal.
About British thermal units (BTU)
A British thermal unit is about 1,055 J, used for heating and air-conditioning in the US.
About calories (cal)
A (small) calorie is 4.184 J, the energy to warm 1 g of water by 1 °C. Food “Calories” are actually kilocalories.
More conversions
BTU to other units
Frequently asked questions
How many calories are in one British thermal unit?
One British thermal unit equals 252.1644 calories.
How many British thermal units are in one calorie?
One calorie equals 0.003965667 British thermal units.
How do I convert British thermal units to calories?
Use the formula cal = BTU × 252.1644. For example, 5 BTU × 252.1644 = 1,260.822 cal.