Calories to Joules
Convert calories to joules instantly — type a value, get the answer.
Joules4.1840J
Multiply calories by 4.184 to get joules. 1 cal = 4.184 J.
| Calories (cal) | Joules (J) |
|---|---|
| 1 cal | 4.184 J |
| 2 cal | 8.368 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 |
Common calories-to-joules conversions, rounded to 4 decimals.
How to convert calories to joules
Multiply the number of calories by 4.184. For example, 10 cal × 4.184 = 41.84 J. The converter above does this for any value instantly, and the table below lists the conversions people look up most.
Converting joules back to calories
To go the other way, divide the J value by 4.184 — or multiply by 0.239. So 1 J ≈ 0.239 cal.
Questions
How many joules are in a calorie?
One calorie equals 4.184 joules. Multiply any cal figure by 4.184 to convert it to J.
How do I convert joules back to calories?
Divide the J value by 4.184, or multiply by 0.239. For example, 5 J ≈ 1.195 cal.
What is 10 cal in J?
10 cal = 41.84 J. Type any value into the converter above to see its joules equivalent.