Calories are units o energy. Various defineetions exeest but faw intae twa broad categories.

  • The smaw calorie or gram calorie (seembol: cal) is the approximate amoont o energy needit tae raise the temperatur o ane gram o watter bi ane degree Celsius at a pressur o one atmosphere.[1]
  • The lairge calorie or kilogram calorie (seembol: Cal), an aa kent as the fuid calorie an seemilar names,[2] is defined in terms o the kilogram rather nor the gram. It is equal tae 1000 smaw calories, 1 kilocalorie (seembol: kcal).[1]


  1. 1.0 1.1 Merriam-Webster's Online Dictionary Def 1a
  2. Conn, Carole; Len Kravitz. "Remarkable Calorie". University of New Mexico. Retrieved 30 April 2014.