A calorie to a physicist is a small unit of energy - it would not be meaningful in terms of your diet. Therefore, food is measured in terms of kilocalories (1000 cal). The abbreviation for this dietary Calorie is therefore kcal, but they mean the same thing. 1 kcal = 1 dietary Calorie = 1000 calories (in a Physics lab). A dietary Calorie is abbreviated kcal, a physics calorie is abbreviated cal.
I'm confused between kcal and calories because some of the nutritional facts from the food indicates kcal and some are calories. Are they both same? I already read it at wikipedia that they both the same. Could you please help me to discuss it further? Thanks.
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