Kilojoule to Calorie
Convert kJ to cal instantly — free, no sign-up.
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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.
About the Calorie (cal)
The Calorie is the small (thermochemical) calorie, defined as the energy needed to raise 1 gram of water by 1°C — not the unit on food labels, which uses the much larger kilocalorie.
How to convert kJ to cal
- Enter the value in kJ in the box above.
- The cal equivalent updates instantly.
- Use the swap button to convert cal back to kJ just as easily.