Full name: femtowatt
Plural form: femtowatts
Category type: power
Scale factor: 1.0E-15
The SI derived unit for power is the watt.
1 watt is equal to 1.0E+15 femtowatt.
Valid units must be of the power type.
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The SI prefix "femto" represents a factor of 10-15, or in exponential notation, 1E-15.
So 1 femtowatt = 10-15 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).