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How many calories in 1 joules?
The answer is 0.23890295761862.
We assume you are converting between calorie [15 °C] and joule.
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calories or joules
The SI derived unit for energy is the joule.
1 calories is equal to 4.1858 joule.
Note that rounding errors may occur, so always check the results.
Use this page to learn how to convert between calories and joules.
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You can do the reverse unit conversion from joules 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 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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