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The kilogram calorie (also known as the large calorie, food calorie, or kilocalorie) is the energy to raise the temperature of one kilogram of water by one degree Celsius at a pressure of one atmosphere. This unit is widely used in nutrition to quantify the energy content of foods.
Kilojoules
A kilojoule (kJ) is equivalent to one thousand joules (J). It is the energy required when a force of one thousand newtons is applied over a distance of one meter, or one newton applied over a kilometer. In reality, a joule is roughly the energy required to lift a small apple one meter against Earth's gravity.
