Joules to Kilocalories conversion

Joules (J) to Kilocalories (kcal) 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 Joules to Kilocalories:

One joule is equal to 0.000239006 kilocalories:

1 J = 0.000239006 kcal


Formula:

The energy conversion from J to kcal is given by the formula:

The energy in joules E(eV) is equal to the energy in kilocalories E(kcal-th) divided by 4184:

E(kcal) = E(J) / 4184 J


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