Instantly convert joules (J) to calories (cal). Bidirectional, accurate, and free.
To convert joules to calories, use the formula calories = joules × 0.239. For example, 2 joules equals 0.478 calories. Type any number into the calculator above and the result appears instantly — you can also type into the calories box to convert the other way.
| Joules | Calories |
|---|---|
| 50 J | 11.9503 cal |
| 100 J | 23.9006 cal |
| 150 J | 35.8509 cal |
| 200 J | 47.8011 cal |
| 250 J | 59.7514 cal |
| 300 J | 71.7017 cal |
| 400 J | 95.6023 cal |
| 500 J | 119.5 cal |
There are 0.239 calories in one joule. To convert any value, apply the formula calories = joules × 0.239.
The formula is calories = joules × 0.239. 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.