Convert Kilocalories to Kilojoules
500 kcal = 2,092 kJ
kJ = kcal × 4.184Convert kilocalories to kilojoules instantly — type in either box and it works both ways.
How to convert kilocalories to kilojoules
To convert kilocalories to kilojoules, multiply the number of kilocalories by 4.184.
kJ = kcal × 4.184
Example: convert 500 kcal to kJ
- 500 × 4.184 = 2,092
- 500 kcal = 2,092 kJ
1 kcal = 4.184 kJ and 1 kJ = 0.239006 kcal.
Kilocalories to Kilojoules conversion chart
| Kilocalories (kcal) | Kilojoules (kJ) |
|---|---|
| 1 kcal | 4.184 kJ |
| 10 kcal | 41.84 kJ |
| 50 kcal | 209.2 kJ |
| 100 kcal | 418.4 kJ |
| 200 kcal | 836.8 kJ |
| 500 kcal | 2,092 kJ |
| 1,000 kcal | 4,184 kJ |
| 2,000 kcal | 8,368 kJ |
| 2,500 kcal | 10,460 kJ |
| 5,000 kcal | 20,920 kJ |
Frequently asked questions
How do you convert kilocalories to kilojoules?
To convert kilocalories to kilojoules, multiply the number of kilocalories by 4.184. The formula is kJ = kcal × 4.184.
How many kilojoules are in one kilocalorie?
1 kcal = 4.184 kJ.
How do I convert kilojoules back to kilocalories?
Use the reverse formula: kcal = kJ ÷ 4.184. For example 1 kJ = 0.239006 kcal.
Is this converter free and accurate?
Yes. It is free, uses exact internationally defined conversion factors, and runs in your browser — nothing you type is sent anywhere.
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