Kilocalories to joules conversion

Enter the energy in calories and press the Convert button:

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

Joules to kcal conversion ►

Kilocalories to joules

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.

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.

How to convert from kcal to joules

Thermochemical / food kilocalories to joules

1 kcal_th = 4184 J

The energy in joules E_(J) is equal to 4184 times the energy in thermochemical / food kilocalories E_(kcal):

E_(J) = 4184 × E_(kcal-th)

Example

Convert 0.3 kcal_th to joules.

E_(J)

= 4184 × 0.3 kcal_th = 1255.2 J

International kilocalories to joules

1 kcal_IT

= 4186.8 J

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

E_(J) = 4186.8 × E_(kcal-IT)

Example

Convert 0.3 kcal_IT to joules.

E_(J) = 4186.8 × 0.3kcal_IT = 1256.04 J

15°C kilocalories to joules

1 kcal₁₅ = 4185.5 J

The energy in joules E_(J) is equal to 4185.5 times the energy in 15°C kilocalories E_(kcal15)

:

E_(J) = 4185.5 × E_(kcal15)

Example

Convert 0.3 kcal₁₅

to joules.

E_(J) = 4185.5 × 0.3kcal₁₅ = 1255.65 J

20°C kilocalories to joules

1 kcal₂₀ = 4182 J

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

E_(J) = 4182 × E_(kcal20)

Example

Convert 0.3 kcal20 to joules.

E_(J) = 4182 × 0.3kcal₂₀ = 1254.6 J

Joules to kcal conversion ►