Convert Joule to Calorie
1 joule = 0.2390057 calorie (cal). For example, 10 joule = 2.390057 calorie and 100 joule = 23.90057 calorie. Type any value below to convert joule to calorie both ways — it runs entirely in your browser.
Joule to Calorie conversion formula
To convert joule to calorie, multiply by 0.2390057:
calorie = joule × 0.2390057
Going the other way, 1 calorie = 4.184 joule, so
joule = calorie × 4.184.
Joule to Calorie — worked examples
| Joule | Calorie |
|---|---|
| 1 J | 0.2390057 cal |
| 2 J | 0.4780115 cal |
| 3 J | 0.7170172 cal |
| 5 J | 1.195029 cal |
| 10 J | 2.390057 cal |
| 25 J | 5.975143 cal |
| 50 J | 11.95029 cal |
| 100 J | 23.90057 cal |
Joule ↔ Calorie reference table
| Joule → Calorie | Calorie → Joule |
|---|---|
| 1 J = 0.2390057 cal | 1 cal = 4.184 J |
| 2 J = 0.4780115 cal | 2 cal = 8.368 J |
| 5 J = 1.195029 cal | 5 cal = 20.92 J |
| 10 J = 2.390057 cal | 10 cal = 41.84 J |
| 20 J = 4.780115 cal | 20 cal = 83.68 J |
| 50 J = 11.95029 cal | 50 cal = 209.2 J |
| 100 J = 23.90057 cal | 100 cal = 418.4 J |
| 250 J = 59.75143 cal | 250 cal = 1,046 J |
| 500 J = 119.5029 cal | 500 cal = 2,092 J |
| 1000 J = 239.0057 cal | 1000 cal = 4,184 J |
About joule and calorie
Joule: The joule is the SI unit of energy — the work done by a force of one newton acting over one metre (1 J = 1 N·m), and also one watt-second.
Calorie: A (small/gram) calorie is roughly the heat needed to raise 1 g of water by 1 °C — the thermochemical calorie is exactly 4.184 J. The food "Calorie" is actually a kilocalorie.
Frequently asked questions
- How many calorie are in 1 joule?
- 1 joule = 0.2390057 calorie (cal).
- How do I convert joule to calorie?
- Multiply the number of joule by 0.2390057. For example, 10 joule = 10 × 0.2390057 = 2.390057 calorie.
- How many joule are in 1 calorie?
- 1 calorie = 4.184 joule.
- Which is bigger, joule or calorie?
- 1 calorie equals 4.184 joule, so a calorie is the larger unit.