Convert kilojoules to kilocalories
Enter a value in kilojoules (kJ) to get kilocalories (kcal). One kilojoule is 0.239006 kilocalories; one kilocalorie is 4.184 kilojoules.
How to use the Kilojoule to kilocalorie
- Type the number of kilojoules.
- Click Convert.
- Read the result in kilocalories, plus the same value in every other energy unit.
kJ to kcal formula
kilocalories = kilojoules × 0.239006. To go the other way, kilojoules = kilocalories × 4.184 (see kilocalories to kilojoules).
Worked example
12 kJ × 0.239006 = 2.8681 kcal.
Kilojoules to kilocalories conversion table
| Kilojoules | Kilocalories |
|---|---|
| 0.1 kJ | 0.023901 kcal |
| 0.5 kJ | 0.119503 kcal |
| 1 kJ | 0.239006 kcal |
| 2 kJ | 0.478011 kcal |
| 3 kJ | 0.717017 kcal |
| 5 kJ | 1.195 kcal |
| 10 kJ | 2.3901 kcal |
| 20 kJ | 4.7801 kcal |
| 25 kJ | 5.9751 kcal |
| 50 kJ | 11.9503 kcal |
| 100 kJ | 23.9006 kcal |
| 250 kJ | 59.7514 kcal |
| 500 kJ | 119.5029 kcal |
| 1,000 kJ | 239.0057 kcal |
About the kilojoule
Food energy on labels in Australia, New Zealand and Europe (alongside kcal).
About the kilocalorie
The food Calorie: 1,000 small calories, 4,184 J. Nutrition labels worldwide.
Related conversions
kilocalories to kilojoules · kilojoules to kilowatt-hours · any unit.
Frequently asked questions
How many kilocalories in a kilojoule?
0.239006 kilocalories.
How many kilojoules in a kilocalorie?
4.184 kilojoules.
Is the factor exact?
The factor 0.239006 is derived from the units' exact definitions; only the display is rounded.
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Last updated 2026-09-23.