Watt conversions

Convert watts to

watt (unit of power), pl. watts, abbr. W

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About watt

The watt is the derived unit of power in the International System of Units (SI).

One watt (W) is equal to 1,000,000 microwatts (μW), or 1,000 milliwatts (mW), or 0.001 kilowatts (kW), or 10-6 megawatts (MW) or 10-9 gigawatts (GW).

The watt measures the rate at which the energy is transformed. One watt is equal to one joule per second. The joule is a derived unit of energy in the SI while the second is a unit of time in the SI. The watt unit is named after the Scottish engineer James Watt who lived between 1736 and 1819.

1 W = 1 J/s = 1 N×m/s = 1 kg×m2/s3

Symbol: W

Plural: watts

Subdivisions and multiples of the watt using SI prefixes

Subdivisions of the watt
Name Symbol Value
deciwatt dW 10-1 W
centiwatt cW 10-2 W
milliwatt mW 10-3 W
microwatt μW 10-6 W
nanowatt nW 10-9 W
picowatt pW 10-12 W
femtowatt fW 10-15 W
attowatt aW 10-18 W
zeptowatt zW 10-21 W
yoctowatt yW 10-24 W
Multiples of the watt
Name Symbol Value
decawatt daW 101 W
hectowatt hW 102 W
kilowatt kW 103 W
megawatt MW 106 W
gigawatt GW 109 W
terawatt TW 1012 W
petawatt PW 1015 W
exawatt EW 1018 W
zettawatt ZW 1021 W
yottawatt YW 1024 W

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