How many kilocalories are in 1 British thermal unit?

1 British thermal unit equals 0.252164 kcal.

How do I convert kilocalories back to British thermal units?

Use the reverse converter: 1 kilocalorie equals 3.96567 BTU.

Yes. It uses the exact SI/NIST definitions of each unit and shows up to 6 significant digits.

To convert British thermal units to kilocalories, multiply the value by 0.252164401.

kcal = BTU × 0.252164401

40 BTU × 0.252164401 = 10.09 kcal

British Thermal Unit (BTU): Used for heating, cooling and gas in the US. The IT BTU is about 1,055.056 joules.
Kilocalorie (kcal): The "food calorie" on nutrition labels. Equal to 4,184 joules.

How do I convert British thermal units to kilocalories?: To convert British thermal units to kilocalories, multiply the value by 0.252164401.
How many kilocalories are in 1 British thermal unit?: 1 British thermal unit equals 0.252164 kcal.
How many kilocalories are in 10 British thermal units?: 10 BTU equals 2.52164 kcal.
How do I convert kilocalories back to British thermal units?: Use the reverse converter: 1 kilocalorie equals 3.96567 BTU.
Is this converter accurate?: Yes. It uses the exact SI/NIST definitions of each unit and shows up to 6 significant digits.