Calories to Joules Converter
Convert calories to joules with a free calculator
How to Convert Calories to Joules
Formula: 1 cal = 4.184 J
Multiply your calories value by 4.184 to get the equivalent in joules. The conversion factor 4.184 is based on the internationally accepted definitions of both units.
Calories to Joules Reference Table
| Calories (cal) | Joules (J) |
|---|---|
| 1 cal | 4.184 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 |
| 500 cal | 2,092 J |
| 1000 cal | 4,184 J |
Related Conversions
Frequently Asked Questions
How many joules are in 1 calorie? +
1 calorie (small calorie) equals exactly 4.184 joules.
How many joules are in a food Calorie? +
1 food Calorie (kcal) equals 4,184 joules or 4.184 kJ.
Why do some countries use kilojoules on food labels? +
Australia, New Zealand, and some European countries use kJ on nutrition labels. The US and UK use Calories (kcal). Both measure the same thing, just in different units.