How many kilowatt-hour in 1 attojoule?
The answer is 2.7777777777778E-25.
We assume you are converting between kilowatt hour and attojoule.
You can view more details on each measurement unit: kilowatt-hour or
attojoule
The SI derived unit for energy is the joule.
1 joule is equal to 2.7777777777778E-7 kilowatt-hour, or 1.0E+18 attojoule.
Note that rounding errors may occur, so always check the results.
Use this page to learn how to convert between kilowatt hours and attojoules.
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››Quick conversion chart of kilowatt-hour to 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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