Joules to calories free online conversion

Joules (J) to calories (cal), energy conversion calculator and how to convert.

Joules to calories conversion calculator

Enter the energy in joules, select calorie unit type and press the Convert button:

J
Cal

Calories to joules conversion »

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 from joules to calories

Joules to thermochemical calories

1 calth = 4.184 J

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

E(cal) = E(J) / 4.184

Example

Convert 600 joules to thermochemical calories.

E(cal) = 600J / 4.184 = 143.4 calth

Joules to 15°C calories

1 cal15 = 4.1855 J

The energy in 15°C calories E(cal15) is equal to the energy in joules E(J) divided by 4.1855:

E(cal15) = E(J) / 4.1855

Example

Convert 600 joules to 15°C calories.

E(cal15) = 600J / 4.1855 = 143.352 cal15

Joules to large/food calories

1 Cal = 4.184 kJ = 4184 J

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

E(Cal) = E(J) / 4184

Example

Convert 600 joules to food calories.

E(Cal) = 600J / 4184 = 0.1434 Cal

Calories to joules conversion »


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