Kilojoules to Kilocalories Converter
Convert kilojoule to kilocalorie instantly. Type a value below — the result updates as you type.
When you need to convert kilojoule to kilocalorie
Energy conversions appear on nutrition labels, utility bills and appliance specs, letting you compare food energy, electricity use and heating output on a common scale.
Nutrition labels show energy in both kilojoules and kilocalories (Calories), so converting compares foods directly.
Typical values: 0.5 kJ is about 0.1195 kcal, and 100 kJ works out to roughly 23.9006 kcal. Because the ratio is fixed at 0.239, you can scale any amount linearly — doubling the kilojoules doubles the kilocalories.
Food packaging, power meters and heating equipment each prefer different energy units, so converting makes them directly comparable.
How to convert kilojoule to kilocalorie
One kilojoule equals 0.239 kilocalories. To convert, multiply the number of kilojoules by 0.239:
kilocalories = kilojoules × 0.239
For example, 10 kilojoules × 0.239 = 2.3901 kilocalories.
Kilojoules to kilocalories conversion table
| Energy (kJ) | Kilocalories (kcal) |
|---|---|
| 1 kJ | 0.239 kcal |
| 2 kJ | 0.478 kcal |
| 3 kJ | 0.717 kcal |
| 5 kJ | 1.195 kcal |
| 10 kJ | 2.3901 kcal |
| 20 kJ | 4.7801 kcal |
| 50 kJ | 11.9503 kcal |
| 100 kJ | 23.9006 kcal |
FAQ
How many kilocalories are in a kilojoule?
One kilojoule = 0.239 kilocalories.
How do I convert kilocalories back to kilojoules?
Divide by 0.239, or use the kilocalories to kilojoules converter.