Handy Units
Calories to Joulescal → J
1 cal = 4.184 J · 1 J = 0.239006 cal
Formula
J = cal × 4.184
Example: 100 cal = 100 × 4.184 = 418.4 J
These units differ only by a fixed factor: multiply by it to convert, divide to go back. The factors are exact international definitions (for example 1 inch = 2.54 cm exactly); results are rounded only for display.
Calories and Joules chart
| Calories (cal) | Joules (J) |
|---|---|
| 1 cal | 4.184 J |
| 10 cal | 41.84 J |
| 100 cal | 418.4 J |
| 1,000 cal | 4,184 J |
| Joules (J) | Calories (cal) |
|---|---|
| 1 J | 0.239006 cal |
| 10 J | 2.39006 cal |
| 100 J | 23.9006 cal |
| 1,000 J | 239.006 cal |
| 4,184 J | 1,000 cal |
About these units
Calorie (cal)The small calorie: 1 cal = 4.184 J, and 1,000 cal = 1 kcal.
Joule (J)Joules, the SI unit of energy.
Questions
How many Joules are in 1 Calories?
1 cal = 4.184 J.
How many Calories are in 1 Joules?
1 J = 0.239006 cal.