Kilojoules to kilocalories
Type a value in kilojoules to see it in kilocalories straight away, or type in the second box to convert back.
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Processing and privacy: The result is calculated inside your browser and your data is not sent to any server.
How to use it
- Type the value in the kilojoules box.
- Read the result in kilocalories as you type, and pick the precision you need.
- Swap the direction to convert back, or copy the result.
How it is calculated
kcal = kJ × 0.2390057361
Multiply the value in kilojoules by 0.2390057361 to get kilocalories.
Example
To convert 25 kJ to kilocalories: 25 × 0.2390057361 = 5.97514 kcal.
Conversion table
| Kilojoules (kJ) | Kilocalories (kcal) |
|---|---|
| 1 | 0.239006 |
| 2 | 0.478011 |
| 3 | 0.717017 |
| 5 | 1.19503 |
| 10 | 2.39006 |
| 20 | 4.78011 |
| 25 | 5.97514 |
| 50 | 11.9503 |
| 100 | 23.9006 |
| 250 | 59.7514 |
| 500 | 119.503 |
| 1,000 | 239.006 |
About the units
- Kilojoule
- Exactly 1000 joules. It appears on food labels next to the calorie figure.
- Kilocalorie
- Equal to 1000 thermochemical calories, exactly 4184 joules. This is the everyday food calorie.
Limits and caveats
- Results are rounded for display and computed with the browser's floating point precision (about 15 significant digits).
- Both unit factors are exact by their official definitions.
Questions about this tool
How many kilocalories are in one kilojoule?
1 kJ = 0.239006 kcal exactly.
How do I convert kilojoules to kilocalories?
Use kcal = kJ × 0.2390057361. For example, 25 kJ = 5.97514 kcal.
How many kilojoules are in one kilocalorie?
1 kcal = 4.184 kJ.
Which calorie do these converters use?
The thermochemical calorie, exactly 4.184 joules, the factor many countries use to turn kcal into kJ on food labels. The International Table calorie is 4.1868 joules, less than 0.07% larger.
What is the difference between kW and kWh?
A kilowatt is a unit of power, the rate of using energy, while a kilowatt-hour is an amount of energy. A 2 kW heater running for three hours uses 6 kWh.