Kcal to kJ converter
Convert kilocalories to kilojoules and back. 1 kcal = 4.184 kJ.
Common values
| kcal | kJ |
|---|---|
| 1 | 4.184 |
| 50 | 209 |
| 100 | 418 |
| 150 | 628 |
| 200 | 837 |
| 250 | 1,046 |
| 300 | 1,255 |
| 400 | 1,674 |
| 500 | 2,092 |
| 750 | 3,138 |
| 1,000 | 4,184 |
| 1,500 | 6,276 |
| 2,000 | 8,368 |
| 2,500 | 10,460 |
How it works
One kilocalorie equals 4.184 kilojoules. To get kJ, multiply kcal by 4.184. To get kcal, divide kJ by 4.184. The converter rounds to whole numbers.
EU labels calculate kcal and kJ using separate nutrient factors, so their values may differ from this conversion.
Sources. FAO, Food energy: methods of analysis and conversion factors (2003) · Regulation (EU) No 1169/2011, Annex XIV.
Questions
How many kJ are in 1 kcal?
4.184 kJ.
How many kJ are in 100 kcal?
418 kJ.
Are calories and kilocalories the same?
On food labels and in apps, calories means kilocalories (kcal). One kcal is 1,000 small calories.
Why do some labels show kJ?
Food labels in the EU give energy in both kJ and kcal.
