Kilojoules to Calories conversion

Kilojoules (kJ) to Calories (cal) energy conversion calculator and how to convert.

Small & large calories

Small 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.


How to convert Kilojoules to Calories:

One kilojoule is equal to 0.239006 calories.

1 kJ = 0.239006 cal


Formula:

The energy conversion from kJ to cal is given by the formula:

The energy in thermochemical calories E(calth) is equal to the energy in kilojoules E(kJ) times 239.0057:

E(cal) = E(kJ) * 239.0057


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