ACCURATE CONVERSION
Joules to Calories Converter
Convert joules (J) to calories (cal) with a standards-based formula.
From
To
How to convert joules to calories
Enter a value in the converter above. The result updates immediately using the relationship below.
FORMULA1 joule = 0.23900574 calories
Joules to Calories conversion table
| Joules (J) | Calories (cal) |
|---|---|
| 1 | 0.23900574 |
| 5 | 1.19502868 |
| 10 | 2.39005736 |
| 20 | 4.78011472 |
| 50 | 11.95028681 |
| 100 | 23.90057361 |
Common values
For a quick estimate, multiply by the factor above. Use more decimal places when technical work requires additional precision.
Frequently asked questions
How many calories are in one joule?
One joule equals 0.23900574 calories.
How do you convert joules to calories?
Multiply the joule value by 0.23900574.
Can I convert calories back to joules?
Yes. One calorie equals 4.184 joules; you can also use the swap button.