How many kilojoules 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: kilojoules or
zettajoule
The SI derived unit for energy is the joule.
1 joule is equal to 0.001 kilojoules, 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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You can do the reverse unit conversion from
zettajoule to kilojoules, or enter any two units below:

The SI prefix "kilo" represents a factor of
10^{3}, or in exponential notation, 1E3.

So 1 kilojoule = 10^{3} 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
10^{21}, or in exponential notation, 1E21.

So 1 zettajoule = 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).

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