How to convert kilojoules to kilocalories
One kilojoule equals 0.239 kilocalories, so multiply the value in kilojoules by 0.2390057361: kcal = kJ × 0.2390057361. Equivalently, divide by 4.184.
Example: 10 kJ = 10 × 0.2390057361 = 2.3901 kcal.
Kilojoules to kilocalories table
| Kilojoules (kJ) | Kilocalories (kcal) |
|---|---|
| 0.1 | 0.0239 |
| 0.5 | 0.1195 |
| 1 | 0.239 |
| 2 | 0.478 |
| 3 | 0.717 |
| 4 | 0.956 |
| 5 | 1.195 |
| 6 | 1.434 |
| 7 | 1.673 |
| 8 | 1.912 |
| 9 | 2.1511 |
| 10 | 2.3901 |
| 15 | 3.5851 |
| 20 | 4.7801 |
| 25 | 5.9751 |
| 30 | 7.1702 |
| 40 | 9.5602 |
| 50 | 11.9503 |
| 75 | 17.9254 |
| 100 | 23.9006 |
| 250 | 59.7514 |
| 500 | 119.5029 |
| 1,000 | 239.0057 |
About the units
- Kilojoule (kJ): One thousand joules; food labels in Australia and the EU list energy in kJ.
- Kilocalorie (kcal): The “Calorie” on food labels: the energy to heat 1 kg of water by 1 °C, 4,184 J.
Need the other direction? Convert kilocalories to kilojoules — 1 kilocalorie = 4.184 kilojoules.
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Open the unit converter Frequently asked questions
How many kilocalories are in a kilojoule?
1 kilojoule = 0.239 kilocalories.
What is the formula for kilojoules to kilocalories?
kcal = kJ × 0.2390057361.
How much is 10 kJ in kcal?
10 kJ = 2.3901 kcal.