# What is kcal?

What is a kcal unit?

## kcal definition

kcal is the symbol of kilocalorie.

One kilocalorie is equal to 1000 calories.

### 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.

There are several definitions of calorie according to temperature.

## kcal conversions

### kcal to cal conversion

One kilocalorie is equal to 1000 small calories:

1 kcal = 1000 cal

One kilocalorie is equal to 1 large/food calorie:

1 kcal = 1 Cal

### kcal to kilojoules conversion

There are several definitions of calorie:

#### Thermochemical / food kilocalories to kilojoules

1 kcalth = 4.184 kJ

The energy in kilojoules E(kJ) is equal to 4.184 times the energy in thermochecmical / food kilocalories E(kcal):

E(kJ) = 4.184 × E(kcal-th)

#### International kilocalories to kilojoules

1 kcalIT = 4.1868 kJ

The energy in kilojoules E(kJ) is equal to 4.1868 times the energy in international kilocalories E(kcal-IT):

E(kJ) = 4.1868 × E(kcal-IT)

#### 15°C kilocalories to kilojoules

1 kcal15 = 4.1855 kJ

The energy in kilojoules E(kJ) is equal to 4.1855 times the energy in 15°C kilocalories E(kcal15):

E(kJ) = 4.1855 × E(kcal15)

#### 20°C kilocalories to joules

1 cal20 = 4.182 kJ

The energy in kilojoules E(kJ) is equal to 4.182 times the energy in 20°C kilocalories E(kcal20):

E(kJ) = 4.182 × E(kcal20)

kcal to kJ conversion calculator ►