Convert Joules to Kilocalories
One joule equals 0.000239 kilocalories. Type any value to convert joules to kilocalories instantly — with a full reference table below.
Convert Joules to Kilocalories
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Conversion formula
To convert joules to kilocalories, multiply by 0.000239. One joule equals 0.000239 kcal, and one kilocalorie equals 4,184 J.
Joules to Kilocalories table
About converting Joules to Kilocalories
Joules (J) and Kilocalories (kcal) are both units of energy. The exact factor is 1 J = 0.000239 kcal, so multiply by 0.000239 to go from joules to kilocalories (or divide to go back).
The conversion is exact and runs entirely in your browser. Need the reverse? Use the Kilocalories to Joules converter, or the full unit converter for every unit at once.
Frequently asked questions
How many kilocalories are in one joule?
One joule equals 0.000239 kilocalories.
How do I convert joules to kilocalories?
Multiply the number of joules by 0.000239. For example, 10 joules = 0.00239 kilocalories.
What is 5 joules in kilocalories?
5 joules is 0.001195 kilocalories.