## ››Convert kilojoule to zettajoule

 kilojoule zettajoule

How many kilojoule in 1 zettajoule? The answer is 1.0E+18.
We assume you are converting between kilojoule and zettajoule.
You can view more details on each measurement unit:
kilojoule or zettajoule
The SI derived unit for energy is the joule.
1 joule is equal to 0.001 kilojoule, 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 kilojoules and zettajoules.
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## ››Definition: Kilojoule

The SI prefix "kilo" represents a factor of 103, or in exponential notation, 1E3.

So 1 kilojoule = 103 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: 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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