⚡ Energy converter
Calories to Joules Converter
Convert calories (cal) to joules (J) instantly. Includes formula, worked example, and a full reference chart from 1 to 1000 cal.
Calories
cal
Joules
J
How to convert calories to joules
One thermochemical calorie equals exactly 4.184 joules. To convert calories to joules, multiply the calorie value by 4.184.
Formula
J = cal × 4.184
Worked example
Convert 100 cal to J:
100 cal × 4.184 → 418.4 J
100 cal × 4.184 → 418.4 J
Common calories to joules values
Quick reference for common calorie values:
- 1 cal = 4.184 J
- 5 cal = 20.92 J
- 10 cal = 41.84 J
- 100 cal = 418.4 J
Calories to Joules conversion table
Full reference chart — useful for cooking, fitness, engineering, or homework.
| Calories | Joules |
|---|---|
| 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 |
| 20 cal | 83.68 J |
| 25 cal | 104.6 J |
| 50 cal | 209.2 J |
| 75 cal | 313.8 J |
| 100 cal | 418.4 J |
| 250 cal | 1,046 J |
| 500 cal | 2,092 J |
| 1000 cal | 4,184 J |
Joules to Calories table (reverse)
Looking the other way? Here's the reverse conversion:
| Joules | Calories |
|---|---|
| 1 J | 0.239006 cal |
| 2 J | 0.478011 cal |
| 3 J | 0.717017 cal |
| 5 J | 1.195029 cal |
| 10 J | 2.390057 cal |
| 20 J | 4.780115 cal |
| 25 J | 5.975143 cal |
| 50 J | 11.950287 cal |
| 75 J | 17.92543 cal |
| 100 J | 23.900574 cal |
| 250 J | 59.751434 cal |
| 500 J | 119.502868 cal |
| 1000 J | 239.005736 cal |
Frequently asked questions
How many joules are in 1 calorie?
There are 4.184 J in 1 cal.
How many joules are in 10 calories?
10 cal = 41.84 J.
How many calories are in 1 joule?
1 J = 0.239006 cal.
What is the formula to convert calories to joules?
The formula is J = cal × 4.184.