What is kcal? - RapidTables
www.rapidtables.com › convert › energySmall calorie (cal) is the energy needed to increase 1 gram of water by 1°C at a pressure of 1 atmosphere. Large calorie (Cal) is the energy needed to increase 1 kg of water by 1°C at a pressure of 1 atmosphere. Large calorie is also called food calorie and is used as a unit of food energy.