Joules to kilocalories conversion

Joules (J) to kilocalories (kcal) energy conversion calculator and how to convert.

Joules to kilocalories conversion calculator

Enter the energy in joules and press the Convert button:

Enter energy in joules:		J
Select calorie unit type:	Thermochemical/food calorie International calorie 15°C calorie 20°C calorie
Energy result in kilocalories:

kcal to joules conversion ►

Joules to Kilocalories

The joule is the energy equal to the force on an object of one newton at a distance of one meter. One joule is equal to the heat energy dissipated by the current of one ampere through one ohm of resistance for one second.

One joule is also equal to the energy needed to move an electric charge of one coulomb through a potential difference of one volt. In addition, one joule is also equal to the one watt-second.

The joule is the SI derived unit for energy in the metric system. Joules can be abbreviated as J; for example, 1 joule can be written as 1 J.

One kilocalorie, is equal to the heat needed to raise the temperature of one kilogram of water from 14.5 to 15.5 degrees Celsius.

Kilocalories can be abbreviated as kcal; for example, 1 kilocalorie can be written as 1 kcal.

When being used to measure nutrition or metabolic processes, the large calorie is used, which is equal to one kilocalorie.

How to convert from joules to kcal

Joules to thermochemical / food kilocalories

1 kcal_{th = 4184 J}

The energy in joules E_(J) is equal to the energy in kilocalories E_(kcal-th) divided by 4184:

E_(kcal)

= E_(J) / 4184

Example

Convert 5000 joules to kilocalories.

E_(kcal) = 5000 J / 4184 = 1.195 kcal

Joules to international kilocalories

1 kcal_IT = 4186.8 J

The energy in joules E_(J) is equal to the energy in international kilocalories E_(kcal-IT) divided by 4186.8:

E_(kcal-IT) = E_(J) / 4186.8

Example

Convert 5000 joules to kilocalories.

E_(kcal-IT) = 5000 J / 4186.8 = 1.194 kcal_IT

Joules to 15°C kilocalories

1 kcal15 = 4185.5 J

The energy in joules E(J) is equal to the energy in 15°C kilocalories E(kcal15) divided by 4185.5:

E_(kcal15) = E_(J) / 4185.5

Example

Convert 5000 joules to kilocalories.

E(kcal₁₅) = 5000 J / 4185.5 = 1.195 kcal₁₅

Joules to 20°C kilocalories

1 kcal₂₀ = 4182 J

The energy in joules E_(J) is equal to the energy in 20°C kilocalories E_(kcal20) divided by 4182:

E_(kcal20) = E_(J) / 4182

Example

Convert 5000 joules to kilocalories.

E_(kcal20) = 5000 J / 4182 = 1.196 kcal₂₀

kcal to joules conversion ►