Calorie to BTU
Convert Calorie to BTU instantly. Free online engineering unit converter with exact formula, conversion table and FAQ.
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Formula
BTU = cal × 0.00396567
cal = BTU × 252.164
Conversion table
| 1 cal | 0.00396567 BTU |
| 5 cal | 0.0198283 BTU |
| 10 cal | 0.0396567 BTU |
| 20 cal | 0.0793133 BTU |
| 50 cal | 0.198283 BTU |
| 100 cal | 0.396567 BTU |
| 500 cal | 1.98283 BTU |
| 1000 cal | 3.96567 BTU |
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Frequently asked questions
What is the source unit in this conversion?
The source unit is the Calorie (cal). A thermochemical calorie is 4.184 joules.
What is the destination unit in this conversion?
The destination unit is the BTU (BTU). British thermal unit.
How do I convert Calorie to BTU?
Multiply the Calorie value by 0.00396567. For example, 10 cal × 0.00396567 = 0.0396567 BTU.
Is the Calorie to BTU conversion exact?
Yes. Both units belong to the same engineering measurement family (energy), so the ratio between them is a fixed, defined value rather than a measured approximation.
Where is this conversion commonly used?
It's used whenever a value expressed in Calorie needs to be compared with, or reported in, BTU, such as in engineering, scientific, or industrial calculations.
Can I convert BTU back to Calorie?
Yes. Multiply the BTU value by 252.164 to get Calorie.
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About this conversion
This page converts Calorie (cal) to BTU (BTU) within the engineering converter.
A thermochemical calorie is 4.184 joules. British thermal unit.
The formula is BTU = cal × 0.00396567, based on each unit's fixed relationship to the energy base unit.
The conversion is exact, since it relies on a fixed numerical ratio between the two units rather than a measured or approximate value.
Use the calculator above for instant results, or the table below for common Calorie values already converted to BTU.