How many joule in 1 calorie?
The answer is 4.1858.
We assume you are converting between joule and calorie [15 °C].
You can view more details on each measurement unit: joule or
calorie
The SI derived unit for energy is the joule.
1 joule is equal to 0.23890295761862 calorie.
Note that rounding errors may occur, so always check the results.
Use this page to learn how to convert between joules and calories.
Type in your own numbers in the form to convert the units!

››Quick conversion chart of joule to calorie

1 joule to calorie = 0.2389 calorie

5 joule to calorie = 1.19451 calorie

10 joule to calorie = 2.38903 calorie

20 joule to calorie = 4.77806 calorie

30 joule to calorie = 7.16709 calorie

40 joule to calorie = 9.55612 calorie

50 joule to calorie = 11.94515 calorie

75 joule to calorie = 17.91772 calorie

100 joule to calorie = 23.8903 calorie

››Want other units?

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

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).

››Definition: Calorie

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.

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