## ››Convert zeptojoule to zettawatthour

 zeptojoule zettawatthour

How many zeptojoule in 1 zettawatthour? The answer is 3.6E+45.
We assume you are converting between zeptojoule and zettawatthour.
You can view more details on each measurement unit:
zeptojoule or zettawatthour
The SI derived unit for energy is the joule.
1 joule is equal to 1.0E+21 zeptojoule, or 2.7777777777778E-25 zettawatthour.
Note that rounding errors may occur, so always check the results.
Use this page to learn how to convert between zeptojoules and zettawatthour.
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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: Zettawatthour

The SI prefix "zetta" represents a factor of 1021, or in exponential notation, 1E21.

So 1 zettawatthour = 1021 .

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