Type a value to convert calories to joules instantly. This free converter shows the formula and a quick reference table, and the box works both ways — edit either side.
1 cal = 4.184 J · Open the full converter →
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To convert calories to joules, multiply the calorie value by 4.184. So joules = calories × 4.184. For example, 100 cal = 418.4 J. To go the other way, divide by the same number.
| Calories (cal) | Joules (J) |
|---|---|
| 1 cal | 4.184 J |
| 10 cal | 41.84 J |
| 50 cal | 209.2 J |
| 100 cal | 418.4 J |
| 500 cal | 2092 J |
| 1000 cal | 4184 J |
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