Calories to Joules conversion

How to convert energy in Calories (cal) to Joules (J).

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 Calories to Joules:

1 gram calorie is equal to 4.184 joules.

1 calth = 4.184 J


Formula:

The energy conversion from thermochemical Calories to Joules is given by the formula:

E(J) = 4.184 * E(calth)


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