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03 Mar 2003

Calories
Hi, i was just wondering exactly how many calories are in a kilo?
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FitnessDoc
fitnessdoc

01 Jan 0001

The different forms such as kilojoules, calories etc. come about because of the different units of expression energy - it's much the same as kilometres and miles, or metres and yards.

All three are units of energy. One kilocalorie (kCal) is equal to 4.184 kilojoules (kJ). The Calorie (spelled with a capital C) is exactly the same as the kCal. A calorie (with a small letter C) is equal to one thousandth of a kilocalorie (Don't ask me to explain this one!).

SO, in other words

1 kCal = 4.184 kJ
1 kCal = 1 Calorie
1 kCal - 1000 calories

Then, in terms of the actual calorie content of different foods, one gram of fat contains 37 kJ, one gram of carbohydrates contains 17 kj and one gram of protein usually contains about 17 kJ.

Hope this helps


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