Calories to Joules Converter
Convert calories (cal) to joules (J) instantly. 1 calorie = 4.184 joules.
How to convert calories to joules
J = cal × 4.184
To convert calories to joules, multiply the energy value by 4.184. One calorie (cal) is equal to 4.184 joules (J). For quick everyday conversions, the interactive converter above gives you the exact result as you type — no rounding surprises.
Calories to Joules conversion table
| Calories (cal) | Joules (J) |
|---|---|
| 1 cal | 4.184 J |
| 2 cal | 8.368 J |
| 3 cal | 12.552 J |
| 4 cal | 16.736 J |
| 5 cal | 20.92 J |
| 6 cal | 25.104 J |
| 7 cal | 29.288 J |
| 8 cal | 33.472 J |
| 9 cal | 37.656 J |
| 10 cal | 41.84 J |
| 15 cal | 62.76 J |
| 20 cal | 83.68 J |
| 25 cal | 104.6 J |
| 50 cal | 209.2 J |
| 100 cal | 418.4 J |
Frequently asked questions
How many joules are in 1 calorie?
1 calorie equals 4.184 joules.
How do I convert calories to joules?
Multiply the number of calories by 4.184. For example, 8 cal × 4.184 = 33.472 J.
What is 8 calories in joules?
8 calories is equal to 33.472 joules.
Can I convert joules back to calories?
Yes — use our Joules to Calories converter, or divide by 4.184.