## Convert joule/second to zettawatt

 joule/second zettawatt

How many joule/second in 1 zettawatt? The answer is 1.0E+21.
We assume you are converting between joule/second and zettawatt.
You can view more details on each measurement unit:
joule/second or zettawatt
The SI derived unit for power is the watt.
1 watt is equal to 1 joule/second, or 1.0E-21 zettawatt.
Note that rounding errors may occur, so always check the results.
Use this page to learn how to convert between joules/second and zettawatts.
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## Definition: Zettawatt

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

So 1 zettawatt = 1021 watts.

The definition of a watt is as follows:

The watt (symbol: W) is the SI derived unit for power. It is equivalent to one joule per second (1 J/s), or in electrical units, one volt ampere (1 V·A).

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