Kilojoules to Kilocalories converter

To convert kilojoules to kilocalories, enter the value in the first field. The result in kilocalories is calculated automatically using the exact conversion factor.

1 kJ ≈ 0.239005736138 kcal
1 kcal = 4.184 kJ

Formula: kcal ≈ kJ × 0.239005736138
kJ = kcal × 4.184

Definitions: 1 kJ = 1000 J; 1 kcal = 1000 cal

The kilojoule (kJ) is 1,000 joules. It is used for food energy on nutrition labels in Australia, New Zealand and Europe, often next to kcal, and for reaction energies in chemistry.

The kilocalorie (kcal) is 1,000 calories, exactly 4,184 joules. It is the unit behind the Calories on food labels and is used for diet and exercise energy, especially in the United States and, next to kilojoules, in many other countries.

See the conversion table with commonly used values, handy for quick reference or study.