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Question

14 Aug 2007

Whats the difference?
Hi

What is the difference between kj and ka? Why does most food labels only give you the kj but when you diet they tell you to look at your ka intake.
Answer 307 views
Expert
DietDoc
DietDoc

01 Jan 0001

Dear Just Me
I presume you mean 'ca' for calories?? Calories are the non-metric measure of food energy while kilojoules are the metric measure. 1 cal = 4.2 kJ, so every time you see an energy value expressed in kilojoules you divide by 4.2 to find the calorie value. In SA we generally recommend that adult women should eat 1500 cal or 6300 kJ per day when they need to lose weight.
Best regards
DietDoc
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