## ››Convert attowatt to joule/second

 attowatt joule/second

How many attowatt in 1 joule/second? The answer is 1.0E+18.
We assume you are converting between attowatt and joule/second.
You can view more details on each measurement unit:
attowatt or joule/second
The SI derived unit for power is the watt.
1 watt is equal to 1.0E+18 attowatt, or 1 joule/second.
Note that rounding errors may occur, so always check the results.
Use this page to learn how to convert between attowatts and joules/second.
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## ››Definition: Attowatt

The SI prefix "atto" represents a factor of 10-18, or in exponential notation, 1E-18.

So 1 attowatt = 10-18 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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