# Joules to calories 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:

 Enter energy in joules: J Select calorie unit type: Small thermochemical calories Small 15ºC calories Large/food calories Energy result in calories:

Calories to joules 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 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 15ºC calories

1 cal15 = 4.1855 J

The energy in 15ºC 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 15ºC 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