Convert joules to calories
1 J = 0.23900574 cal. Change the amount below, or read the formula and the reference table further down.
1 joule equals
calories
1 J = 0.23900574 cal
The formula
Joules and calories both measure energy from the same zero, so a single multiplier does the job.
cal = J × 0.2390057361
Going the other way? Convert calories to joules.
Joules to calories table
Common values, rounded for reading.
| Joules (J) | Calories (cal) |
|---|---|
| 1 | 0.239006 |
| 2 | 0.478011 |
| 3 | 0.717017 |
| 4 | 0.956023 |
| 5 | 1.195 |
| 6 | 1.434 |
| 7 | 1.673 |
| 8 | 1.912 |
| 9 | 2.1511 |
| 10 | 2.3901 |
| 15 | 3.5851 |
| 20 | 4.7801 |
| 25 | 5.9751 |
| 30 | 7.1702 |
| 40 | 9.5602 |
| 50 | 11.9503 |
| 75 | 17.9254 |
| 100 | 23.9006 |
| 250 | 59.7514 |
| 500 | 119.5 |
| 1,000 | 239.01 |
Questions people ask
- How many calories are in a joule?
- One joule equals 0.2390057361 calories.
- How do I convert joules to calories by hand?
- Multiply the number of joules by 0.2390057361. For a rough check, 0.239 is close enough for most everyday use.
- What is 1 joule in calories?
- 1 joule is 0.23900574 calories.
Calcuit generates this page from a unit table, so the factors here match every other page on the site.