Calories to Kilojoules Converter
Convert cal to kJ instantly. 1 cal = 0.004184 kJ.
Conversion Formula
kJ = cal × 0.004184
Example
25 cal × 0.004184 = 0.1046 kJ
Convert the other way: Kilojoules to Calories →
Calories to Kilojoules Conversion Table
| Calories (cal) | Kilojoules (kJ) |
|---|---|
| 0.1 | 0.0004184 |
| 0.5 | 0.002092 |
| 1 | 0.004184 |
| 2 | 0.008368 |
| 5 | 0.02092 |
| 10 | 0.04184 |
| 20 | 0.08368 |
| 25 | 0.1046 |
| 50 | 0.2092 |
| 100 | 0.4184 |
| 500 | 2.092 |
| 1,000 | 4.184 |
About These Units
- Calories (cal)
- The thermochemical calorie, exactly 4.184 J, roughly the energy that warms 1 g of water by 1 °C. Chemistry texts use this small calorie, which is one thousandth of the food Calorie on labels.
- Kilojoules (kJ)
- Exactly 1,000 joules. Kilojoules appear on food labels in Australia, New Zealand, and the European Union alongside or instead of calories, and one food Calorie equals about 4.184 kJ.
Frequently Asked Questions
How many kJ are in 1 cal?
1 cal equals 0.004184 kJ.
How do I convert Calories to Kilojoules?
Multiply your Calories value by 0.004184. For example, 25 cal × 0.004184 = 0.1046 kJ.
How many cal are in 1 kJ?
1 kJ equals 239.0057361 cal.