Calories to Kilojoules Converter
Convert food energy between kcal and kJ.
Kilocalories100 kcal
Kilojoules418,4 kJ
Formula: kJ = kcal × 4.184; kcal = kJ / 4.184.
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How is this result calculated?
The conversion uses the fixed factor 4.184. To convert the other way, apply the inverse operation.
Formula: kJ = kcal × 4.184; kcal = kJ / 4.184.
kilocalories and kilojoules express the same quantity in two different unit systems. Use the left field to start from kilocalories, or the right field to run the inverse calculation from kilojoules.
100 kcal is 418.4 kJ.
Frequently asked questions
How do I convert kilocalories to kilojoules?+
Multiply the value by 4.184.
How do I convert kilojoules to kilocalories?+
Divide the value by 4.184.
Is conversion instant?+
Yes, you can type in either field and the other side updates immediately.
Conversion example+
100 kcal is 418.4 kJ.