How many Calorie are in 1 British Thermal Unit?

One british thermal unit equals 252.165392 calorie.

Can I convert Calorie back to British Thermal Unit?

Yes. Enter a value in either field to convert from British Thermal Unit (BTU) to Calorie (cal) or the reverse — results update instantly.

British Thermal Unit to Calorie Converter

BTU → cal

Convert between joules, calories, BTU, kWh, and more energy units. Perfect for physics, nutrition, and electricity calculations.

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How to Convert British Thermal Unit to Calorie

Enter a value above, select your units, and get instant results. Works both ways — British Thermal Unit to Calorie or Calorie to British Thermal Unit.

Formula: Calorie = British Thermal Unit × 252.165392

Quick steps

Enter the value you want to convert in the "British Thermal Unit" field.
Select "British Thermal Unit" as your "From" unit.
Select "Calorie" as your "To" unit.
The converted result appears instantly in the "Calorie" field.
To reverse the conversion, enter a value in the "Calorie" field instead.

Common British Thermal Unit to Calorie Conversions

British Thermal Unit	Calorie
1	252.165392
5	1,260.82696
10	2,521.65392
25	6,304.134799
50	12,608.269598
100	25,216.539197

Frequently Asked Questions

Multiply your british thermal unit value by 252.165392. For example, 10 BTU = 2,521.65392 cal.

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Convert British Thermal Unit to Calorie