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How many calories in 1 kJ?
The answer is 238.90295761862.

We assume you are converting between **calorie [15 °C]** and **kilojoule**.

You can view more details on each measurement unit:

calories or
kJ

The SI derived unit for **energy** is the joule.

1 joule is equal to 0.23890295761862 calories, or 0.001 kJ.

Note that rounding errors may occur, so always check the results.

Use this page to learn how to convert between calories and kilojoules.

Type in your own numbers in the form to convert the units!

You can do the reverse unit conversion from kJ to calories, or enter any two units below:

15 °C calorie: the amount of energy required to warm 1 g of air-free water from 14.5 °C to 15.5 °C at a constant pressure of 101.325 kPa (1 atm). Experimental values of this calorie ranged from 4.1852 J to 4.1858 J. The CIPM in 1950 published a mean experimental value of 4.1855 J, noting an uncertainty of 0.0005 J.

The SI prefix "kilo" represents a factor of
10^{3}, or in exponential notation, 1E3.

So 1 kilojoule = 10^{3} joules.

The definition of a joule is as follows:

The joule (symbol J, also called newton meter, watt second, or coulomb volt) is the SI unit of energy and work. The unit is pronounced to rhyme with "tool", and is named in honor of the physicist James Prescott Joule (1818-1889).

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