Convert Joules to Calories
One joule equals 0.239006 calories. Type any value to convert joules to calories instantly — with a full reference table below.
Convert Joules to Calories
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Conversion formula
To convert joules to calories, multiply by 0.239006. One joule equals 0.239006 cal, and one calorie equals 4.184 J.
Joules to Calories table
About converting Joules to Calories
Joules (J) and Calories (cal) are both units of energy. The exact factor is 1 J = 0.239006 cal, so multiply by 0.239006 to go from joules to calories (or divide to go back).
The conversion is exact and runs entirely in your browser. Need the reverse? Use the Calories to Joules converter, or the full unit converter for every unit at once.
Frequently asked questions
How many calories are in one joule?
One joule equals 0.239006 calories.
How do I convert joules to calories?
Multiply the number of joules by 0.239006. For example, 10 joules = 2.390057 calories.
What is 5 joules in calories?
5 joules is 1.195029 calories.