Convert kilojoules to kilocalories
Enter any value to calculate the result instantly.
kilojoules to kilocalories formula
Divide kilojoules by exactly 4.184. One thermochemical kilocalorie equals 4.184 kilojoules.
Conversion table
Use these reference values for a quick comparison. The calculator above accepts positive, negative, decimal, and large values when they are meaningful for the quantity.
| kilojoules | kilocalories |
|---|---|
| 100 kJ | 23.90057361 kcal |
| 250 kJ | 59.75143403 kcal |
| 500 kJ | 119.5028681 kcal |
| 1,000 kJ | 239.0057361 kcal |
| 2,000 kJ | 478.0114722 kcal |
| 2,500 kJ | 597.5143403 kcal |
How to use this converter
Enter the source measurement in the first field. CalUnit applies the displayed formula and updates the destination value immediately. You can use decimals and negative values, copy the result into your work, and compare it with the reference table. Keep the original unit beside the starting measurement so another reader can verify the calculation. For a different unit pair, open the complete energy conversion guide or the multi-unit energy converter.
When this conversion is useful
On food labels, a capital-C Calorie normally means one kilocalorie. Nutrition values are estimates and can be rounded under regional labeling rules.
Accuracy and rounding
The thermochemical conversion factor is exact. Food energy and exercise expenditure figures have much larger practical uncertainty than the unit conversion.
Standards references
CalUnit checks physical unit relationships against authoritative measurement references. See the NIST Guide to the SI conversion factors and the BIPM SI Brochure. Regional cooking measures and digital storage conventions are identified separately because their names can represent more than one definition.