Convert Calories to Kilojoules
One calorie equals 0.004184 kilojoules. Type any value to convert calories to kilojoules instantly — with a full reference table below.
Convert Calories to Kilojoules
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Conversion formula
To convert calories to kilojoules, multiply by 0.004184. One calorie equals 0.004184 kJ, and one kilojoule equals 239.005736 cal.
Calories to Kilojoules table
About converting Calories to Kilojoules
Calories (cal) and Kilojoules (kJ) are both units of energy. The exact factor is 1 cal = 0.004184 kJ, so multiply by 0.004184 to go from calories to kilojoules (or divide to go back).
The conversion is exact and runs entirely in your browser. Need the reverse? Use the Kilojoules to Calories converter, or the full unit converter for every unit at once.
Frequently asked questions
How many kilojoules are in one calorie?
One calorie equals 0.004184 kilojoules.
How do I convert calories to kilojoules?
Multiply the number of calories by 0.004184. For example, 10 calories = 0.04184 kilojoules.
What is 5 calories in kilojoules?
5 calories is 0.02092 kilojoules.