Instantly convert calories (cal) to joules (J). Bidirectional, accurate, and free.
To convert calories to joules, use the formula joules = calories × 4.184. For example, 2 calories equals 8.368 joules. Type any number into the calculator above and the result appears instantly — you can also type into the joules box to convert the other way.
| Calories | Joules |
|---|---|
| 50 cal | 209.2 J |
| 100 cal | 418.4 J |
| 150 cal | 627.6 J |
| 200 cal | 836.8 J |
| 250 cal | 1,046 J |
| 300 cal | 1,255.2 J |
| 400 cal | 1,673.6 J |
| 500 cal | 2,092 J |
There are 4.184 joules in one calorie. To convert any value, apply the formula joules = calories × 4.184.
The formula is joules = calories × 4.184. Enter a value above and the result updates instantly in both directions.
Yes. It uses the exact internationally-defined conversion factor, so results match official standards to several decimal places.
Yes — the converter is bidirectional. Type in either box and the other updates automatically using the inverse formula.