Calories to Joules conversion

Calories (cal) to joules (J), energy conversion calculator and how to convert.

Calories to joules conversion calculator

Select calorie unit type, enter the energy in calories and press the Convert button:

Select calorie unit type:
   
Energy result in joules: J

Joules to calories conversion ►

Small & large calories

Small calorie (cal) is the energy needed to increase 1 gram of water by 1ºC at a pressure of 1 atmosphere.

Large calorie (Cal) is the energy needed to increase 1 kg of water by 1ºC 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 from calories to joules

Thermochemical calories to joules

1 calth = 4.184 J

The energy in joules E(J) is equal to 4.184 times the energy in thermochemical calories E(calth):

E(J) = 4.184 × E(calth)

Example

Convert 300 calth to joules.

E(J) = 4.184 × 300calth = 1255.2 J

15ºC calories to joules

1 cal15 = 4.1855 J

The energy in joules E(J) is equal to 4.1855 times the energy in 15ºC calories E(cal15):

E(J) = 4.1855 × E(cal15)

Example

Convert 300 cal15 to joules.

E(J) = 4.1855 × 300cal15 = 1255.65 J

Large/food calories to joules

1 Cal = 4.184 kJ = 4184 J

The energy in joules E(J) is equal to 4184 times the energy in large/food calories E(Cal):

E(J) = 4184 × E(Cal)

Example

Convert 0.3 Cal to joules.

E(J) = 4184 × 0.3 Cal = 1255.2 J

 

Joules to calories conversion ►

 


See also

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