Joules to Calories conversion

Joules (J) 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 Joules to calories:

Joules to thermochemical calories

1 calth = 4.184 J


Formula:

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

The energy in thermochecmical calories E(calth) is equal to the energy in joules E(J) divided by 4.184:

E(cal) = E(J) / 4.184


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