## ››Convert attojoule to kilowatt hour

 attojoule kilowatt hour

How many attojoule in 1 kilowatt hour? The answer is 3.6E+24.
We assume you are converting between attojoule and kilowatt hour.
You can view more details on each measurement unit:
attojoule or kilowatt hour
The SI derived unit for energy is the joule.
1 joule is equal to 1.0E+18 attojoule, or 2.7777777777778E-7 kilowatt hour.
Note that rounding errors may occur, so always check the results.
Use this page to learn how to convert between attojoules and kilowatt hours.
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## ››Definition: Attojoule

The SI prefix "atto" represents a factor of 10-18, or in exponential notation, 1E-18.

So 1 attojoule = 10-18 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).

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