## Convert megawatt hour to zettajoule

 megawatt-hour zettajoule

How many megawatt-hour in 1 zettajoule? The answer is 277777777777.78. We assume you are converting between megawatt hour and zettajoule. You can view more details on each measurement unit: megawatt-hour or zettajoule The SI derived unit for energy is the joule. 1 joule is equal to 2.7777777777778E-10 megawatt-hour, or 1.0E-21 zettajoule. Note that rounding errors may occur, so always check the results. Use this page to learn how to convert between megawatt hours and zettajoules. Type in your own numbers in the form to convert the units!

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## Definition: Zettajoule

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

So 1 zettajoule = 1021 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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