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Energy
Calories to BTU
Convert calories (cal) to BTU (BTU). Type a value below to see the result update instantly. Reference table and formula included.
Calculator
1 cal = 0.003966 BTU
Calories to BTU Conversion Table
Common values, ready to copy:
| calories | BTU |
|---|---|
| 1 cal | 0.003966 BTU |
| 2 cal | 0.007931 BTU |
| 5 cal | 0.019828 BTU |
| 10 cal | 0.039657 BTU |
| 25 cal | 0.099141 BTU |
| 50 cal | 0.198283 BTU |
| 100 cal | 0.396565 BTU |
| 1,000 cal | 3.9657 BTU |
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Formula
BTU = calories × 3.96565124e-3
Energy uses the SI joule. Food calories (kcal) are 1,000 small calories: 1 kcal = 4,184 J. 1 kWh = 3.6 MJ = 3,600,000 J. 1 BTU = 1,055.06 J.
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