## kilojoules

1 calorie is how many kilojoules. how do i calculate it?

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###### Our expert says:
DietDoc

Dear Mandi
1 calorie or kilocalorie as they should officially be called, is equal to approx. 4.2 kilojoules, thus 100 kcal x 4.2 = 420 kJ. To convert kJ to kcal, you divide 420 kJ by 4.2 to obtain 100 kcal.
Hope this helps
Best regards
DietDoc

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1
###### Posted by: DietDoc | 2011/07/19

Dear Mandi
1 calorie or kilocalorie as they should officially be called, is equal to approx. 4.2 kilojoules, thus 100 kcal x 4.2 = 420 kJ. To convert kJ to kcal, you divide 420 kJ by 4.2 to obtain 100 kcal.
Hope this helps
Best regards
DietDoc