Convert joules (J), calories (cal), kilowatt-hours (kWh), BTU, and other energy units. Energy is the capacity to do work; the joule (J) is the SI unit (1 J = 1 N·m). Nutritional calories and electrical kWh use different reference definitions tied to joules.
This energy converter transforms values from Calories (cal) to Btu (BTU). Results update instantly using the exact conversion factor.
The calorie (cal) is a unit of energy; 1 cal ≈ 4.184 J (thermochemical calorie).
The Btu (BTU) is a unit of energy in the Energy category.
1 cal ÷ 252.164401 = 0.003966 BTU
BTU = cal ÷ 252.164401
To convert cal to BTU, divide the value in cal by 252.164401 (since 1 cal = 0.003966 BTU). Equivalently, multiply by 0.003966. Example: 1 cal = 1 cal × 0.003966 = 0.003966 BTU.
10 cal = 0.039657 BTU ÷ 252.164401 = 10 cal
Common values from cal to BTU.
| cal | BTU |
|---|---|
| 1 | 0.004 |
| 2 | 0.0079 |
| 3 | 0.0119 |
| 4 | 0.0159 |
| 5 | 0.0198 |
| 6 | 0.0238 |
| 7 | 0.0278 |
| 8 | 0.0317 |
| 9 | 0.0357 |
| 10 | 0.0397 |
| 11 | 0.0436 |
| 12 | 0.0476 |
| 13 | 0.0516 |
| 14 | 0.0555 |
| 15 | 0.0595 |
| 16 | 0.0635 |
| 17 | 0.0674 |
| 18 | 0.0714 |
| 19 | 0.0753 |
| 20 | 0.0793 |