calorie to British thermal unit
Live calorie (cal) to British thermal unit (BTU) converter. Plus a 10-value reference table and FAQs.
Conversion table
Ten sample values from calorie to British thermal unit. Use the converter above for arbitrary values.
| calorie (cal) | → | British thermal unit (BTU) |
|---|---|---|
| 0.001 cal | → | 3.9657e-6 BTU |
| 0.01 cal | → | 3.9657e-5 BTU |
| 0.1 cal | → | 0.000397 BTU |
| 0.5 cal | → | 0.001983 BTU |
| 1 cal | → | 0.003966 BTU |
| 2 cal | → | 0.007931 BTU |
| 5 cal | → | 0.019828 BTU |
| 10 cal | → | 0.039657 BTU |
| 100 cal | → | 0.396567 BTU |
| 1,000 cal | → | 3.965667 BTU |
About the calorie
4.184 J. The energy to heat 1 g water by 1 °C.
About the British thermal unit
≈ 1055 J. HVAC in the US.
Frequently asked questions
Frequently Asked Questions
How do I convert calorie to British thermal unit?
Multiply the calorie value by 0.003966 to get it in British thermal unit. For example, 10 cal = 0.0397 BTU.
What is 1 cal in BTU?
1 cal = 0.003966 BTU.
What is 100 cal in BTU?
100 cal = 0.3966 BTU.
What is the formula?
Linear: multiply by 0.003966 (the unit factor ratio).
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