British Thermal Units to Calories
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btu
cal
Quick reference
| British Thermal Units (btu) | Calories (cal) |
|---|
Formula
Calories = british thermal units × 252.16539
Multiply the british thermal units value by 252.16539196940724 to get calories. To reverse — divide calories by 252.16539196940724 to get british thermal units.
About this conversion
The British Thermal Unit (BTU) is the energy needed to raise one pound of water by 1°F, equal to approximately 1,055 joules. Widely used in HVAC and heating systems. Learn more →
The calorie (cal) is the energy needed to raise 1 gram of water by 1°C, equal to approximately 4.184 joules. Learn more →
Source: NIST International Reference