Kilocalorie to Kilojoule
Convert kcal to kJ instantly — free, no sign-up.
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About the Kilocalorie (kcal)
The Kilocalorie is equal to 1,000 small calories — this is what a food label actually means by "Calories" (capital C), the standard unit for dietary energy in the US.
About the Kilojoule (kJ)
The Kilojoule is equal to 1,000 joules, the unit used on nutrition labels in most countries outside the US alongside (or instead of) Calories.
How to convert kcal to kJ
- Enter the value in kcal in the box above.
- The kJ equivalent updates instantly.
- Use the swap button to convert kJ back to kcal just as easily.