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 Joules (J) to Calories (cal). Results update instantly using the exact conversion factor.
The joule (J) is the SI unit of energy (1 J = 1 N·m).
The calorie (cal) is a unit of energy; 1 cal ≈ 4.184 J (thermochemical calorie).
1 J ÷ 4.184 = 0.239006 cal
cal = J ÷ 4.184
To convert J to cal, divide the value in J by 4.184 (since 1 J = 0.239006 cal). Equivalently, multiply by 0.239006. Example: 1 J = 1 J × 0.239006 = 0.239006 cal.
10 J = 2.390057 cal ÷ 4.184 = 10 J
Common values from J to cal.
| J | cal |
|---|---|
| 1 | 0.239 |
| 2 | 0.478 |
| 3 | 0.717 |
| 4 | 0.956 |
| 5 | 1.195 |
| 6 | 1.434 |
| 7 | 1.673 |
| 8 | 1.912 |
| 9 | 2.1511 |
| 10 | 2.3901 |
| 11 | 2.6291 |
| 12 | 2.8681 |
| 13 | 3.1071 |
| 14 | 3.3461 |
| 15 | 3.5851 |
| 16 | 3.8241 |
| 17 | 4.0631 |
| 18 | 4.3021 |
| 19 | 4.5411 |
| 20 | 4.7801 |