Convert Calorie to Joule
1 calorie = 4.184 joule (J). Type any value below to convert calorie to joule both ways — it runs entirely in your browser.
Calorie to Joule conversion formula
To convert calorie to joule, multiply by 4.184:
joule = calorie × 4.184
Going the other way, 1 joule = 0.2390057 calorie, so
calorie = joule × 0.2390057.
Calorie to Joule — worked examples
| Calorie | Joule |
|---|---|
| 1 cal | 4.184 J |
| 2 cal | 8.368 J |
| 3 cal | 12.552 J |
| 5 cal | 20.92 J |
| 10 cal | 41.84 J |
| 25 cal | 104.6 J |
| 50 cal | 209.2 J |
| 100 cal | 418.4 J |
Calorie ↔ Joule reference table
| Calorie → Joule | Joule → Calorie |
|---|---|
| 1 cal = 4.184 J | 1 J = 0.2390057 cal |
| 2 cal = 8.368 J | 2 J = 0.4780115 cal |
| 5 cal = 20.92 J | 5 J = 1.195029 cal |
| 10 cal = 41.84 J | 10 J = 2.390057 cal |
| 20 cal = 83.68 J | 20 J = 4.780115 cal |
| 50 cal = 209.2 J | 50 J = 11.95029 cal |
| 100 cal = 418.4 J | 100 J = 23.90057 cal |
| 250 cal = 1,046 J | 250 J = 59.75143 cal |
| 500 cal = 2,092 J | 500 J = 119.5029 cal |
| 1000 cal = 4,184 J | 1000 J = 239.0057 cal |
About calorie and joule
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.
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.
Frequently asked questions
- How many joule are in 1 calorie?
- 1 calorie = 4.184 joule (J).
- How do I convert calorie to joule?
- Multiply the number of calorie by 4.184. For example, 10 calorie = 10 × 4.184 = 41.84 joule.
- How many calorie are in 1 joule?
- 1 joule = 0.2390057 calorie.
- Which is bigger, calorie or joule?
- 1 calorie equals 4.184 joule, so a calorie is the larger unit.