Calories to BTU Converter
Convert cal to BTU instantly. 1 cal = 0.003965666831 BTU.
Conversion Formula
BTU = cal × 0.003965666831
Example
25 cal × 0.003965666831 = 0.09914167078 BTU
Convert the other way: BTU to Calories →
Calories to BTU Conversion Table
| Calories (cal) | BTU (BTU) |
|---|---|
| 0.1 | 0.000396566683 |
| 0.5 | 0.001982833416 |
| 1 | 0.003965666831 |
| 2 | 0.007931333663 |
| 5 | 0.01982833416 |
| 10 | 0.03965666831 |
| 20 | 0.07931333663 |
| 25 | 0.09914167078 |
| 50 | 0.1982833416 |
| 100 | 0.3965666831 |
| 500 | 1.982833416 |
| 1,000 | 3.965666831 |
About These Units
- Calories (cal)
- The thermochemical calorie, exactly 4.184 J, roughly the energy that warms 1 g of water by 1 °C. Chemistry texts use this small calorie, which is one thousandth of the food Calorie on labels.
- BTU (BTU)
- The British thermal unit, about 1,055.06 J, roughly the heat that raises one pound of water by 1 °F. It is used in the United States for furnace, air conditioner, and natural gas energy figures.
Frequently Asked Questions
How many BTU are in 1 cal?
1 cal equals 0.003965666831 BTU.
How do I convert Calories to BTU?
Multiply your Calories value by 0.003965666831. For example, 25 cal × 0.003965666831 = 0.09914167078 BTU.
How many cal are in 1 BTU?
1 BTU equals 252.1644007 cal.