What is Unit of Energy? (Nutrition)

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The energy value of food is expressed in terms of Kilocalories (Kcal). A Kilo calorie is defined as the amount of heat required to raise the temperature of one kilogram of water by 1° C.

In the metric system, the international unit, which is Kilojoules, is used instead of kilocalories. 1 kilo joule is energy expended when one kilogram of mass is moved by 1 meter using a force of a newton.

  • 1 calorie = 4.184 joule
  • 1 Kcal = 4.184 K joule
  • 1000 Kcal = 4.184 M joule
  • 1 K joule = 0.239 Kcal
  • 1 M joule = 239 Kcal

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