How many British Thermal Unit are in 1 Calorie?

One calorie equals 0.003966 british thermal unit.

Can I convert British Thermal Unit back to Calorie?

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

Calorie to British Thermal Unit Converter

cal → BTU

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

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How to Convert Calorie to British Thermal Unit

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

Formula: British Thermal Unit = Calorie × 0.003966

Quick steps

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

Common Calorie to British Thermal Unit Conversions

Calorie	British Thermal Unit
1	0.003966
5	0.019828
10	0.039657
25	0.099141
50	0.198283
100	0.396565

Frequently Asked Questions

Multiply your calorie value by 0.003966. For example, 10 cal = 0.039657 BTU.

British Thermal Unit to Calorie Calorie to Joule Calorie to Kilojoule Calorie to Kilocalorie Calorie to Watt-hour Calorie to Kilowatt-hour Calorie to British Thermal Unit Calorie to Foot-pound

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Convert Calorie to British Thermal Unit