## ››Convert zeptojoule to calorie [thermochemical]

 zeptojoule calorie [thermochemical]

 Did you mean to convert zeptojoule to calorie [15 °C] calorie [I.T.] calorie [nutritional] calorie [thermochemical]

How many zeptojoule in 1 calorie [thermochemical]? The answer is 4.184E+21.
We assume you are converting between zeptojoule and calorie [thermochemical].
You can view more details on each measurement unit:
zeptojoule or calorie [thermochemical]
The SI derived unit for energy is the joule.
1 joule is equal to 1.0E+21 zeptojoule, or 0.23900573613767 calorie [thermochemical].
Note that rounding errors may occur, so always check the results.
Use this page to learn how to convert between zeptojoules and calories.
Type in your own numbers in the form to convert the units!

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You can do the reverse unit conversion from calorie [thermochemical] to zeptojoule, or enter any two units below:

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## ››Definition: Zeptojoule

The SI prefix "zepto" represents a factor of 10-21, or in exponential notation, 1E-21.

So 1 zeptojoule = 10-21 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).

## ››Definition: Calorie

A calorie refers to a non-SI unit of energy. There are two common but different meanings: one is used in food and nutrition, the other was formerly widely used in chemistry, and a food calorie represents 1000 chemistry calories. The food calorie is sometimes capitalized as Calorie to distinguish it from the chemistry calorie; however, this capitalization is rarely observed in practice.

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