Calories to British thermal units Converter
Convert calories (cal) to british thermal units (BTU) instantly. Energy conversions link food labels in kJ and kcal, SP Group bills in kWh and air-conditioner capacity in BTU.
Result
- British thermal units
- 0.003966 BTU
How to use the calories to british thermal units converter
- Enter the calories (cal).
- The results update as you type, or press Calculate.
- Read the british thermal units first, then the supporting figures below it.
Formula
British thermal units = calories × 0.0039656668
Worked example
For example, with these inputs:
- Calories (cal): 1
the calculator returns:
- British thermal units: 0.003966 BTU
Calories to British thermal units table
| Calories | British thermal units |
|---|---|
| 1 cal | 0.003966 BTU |
| 2 cal | 0.007931 BTU |
| 5 cal | 0.019828 BTU |
| 10 cal | 0.039657 BTU |
| 20 cal | 0.079313 BTU |
| 25 cal | 0.099142 BTU |
| 50 cal | 0.198283 BTU |
| 100 cal | 0.396567 BTU |
| 250 cal | 0.991417 BTU |
| 500 cal | 1.9828 BTU |
| 1,000 cal | 3.9657 BTU |
About this conversion
Energy conversions link food labels in kJ and kcal, SP Group bills in kWh and air-conditioner capacity in BTU.
Unit conversion is simply multiplication by a fixed ratio. The ratio between two units of the same quantity never changes, so once you know it you can convert any value in either direction.
For everyday use, three or four significant figures are usually enough. Engineering, science and trade documents may need more, and rounding should happen only at the end of a calculation.
Frequently asked questions
How many british thermal units are in one calorie?
1 cal = 0.003966 BTU.
How do I convert cal to BTU?
British thermal units = calories × 0.0039656668.