Kilojoules to Kilocalories (kJ to kcal) Converter
1 kilojoule equals 0.23900574 kilocalories — multiply the number of kilojoules by 0.23900574 to convert to kilocalories. A kilocalorie (kcal) is the "Calorie" you see on food labels, so this is the conversion behind nutrition figures.
The formula
To convert kilojoules to kilocalories, multiply by 0.23900574:
kilocalories = kilojoules × 0.23900574
For example, 100 kJ × 0.23900574 = 23.900574 kcal. The reverse factor is 1 kcal = 4.184 kJ.
Conversion table
| Kilojoules (kJ) | Kilocalories (kcal) |
|---|---|
| 1 | 0.239006 |
| 2 | 0.478011 |
| 5 | 1.195029 |
| 10 | 2.390057 |
| 25 | 5.975144 |
| 50 | 11.950287 |
| 100 | 23.900574 |
| 500 | 119.502870 |
| 1000 | 239.005740 |
How to convert online
- Type the number of kilojoules into the first box.
- Read the equivalent kilocalories instantly in the second box.
- Or enter a kilocalorie value to convert back to kilojoules — it works both ways.
Use the Kilojoule to Kilocalorie Converter — free and instant in your browser.
Where this conversion is used
This is the everyday nutrition conversion. Food packaging in Australia, the EU and many other regions lists energy in kilojoules, while calorie counters, diet apps and US labels use kilocalories (food Calories). Converting kJ to kcal lets you compare a product's energy against a daily Calorie target.
FAQ
How many kilocalories are in a kilojoule?
0.23900574 kcal. So 1000 kJ = 239.005740 kcal.
What is the formula to convert kilojoules to kilocalories?
kcal = kJ × 0.23900574. A quick mental estimate is to divide kJ by about 4.2.
How do I convert kilocalories back to kilojoules?
Divide by 0.23900574, or multiply by 4.184. For example, 500 kcal ≈ 2092 kJ.
Is a kilocalorie the same as a food Calorie?
Yes. One kilocalorie equals one dietary Calorie (with a capital C), equal to 1000 small calories.
Related converters
- Kilocalorie to Kilojoule Converter
- Kilojoule to Calorie Converter
- Kilojoule to Joule Converter
- Kilojoule to Kilowatt-hour Converter
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