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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!
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
You can do the reverse unit conversion from calorie to joule, or enter any two units below:
joule to decijoule
joule to kiloton
joule to megawatt-hour
joule to myriawatt-hour
joule to erg
joule to kilocalorie
joule to tonne of coal equivalent
joule to zeptojoule
joule to newton meter
joule to electron volt
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).
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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