Watt

The watt is the unit of power. One watt is one joule of energy per second. It is named in honor of James Watt and is abbreviated W.

mW = milliwatt = 0.001 watts

W = watt = 1,000 mW

kW = kilowatt = 1,000 W

MW = megawatt = 1,000 kW = 1,000,000 W

GW = gigawatt = 1,000 mW = 1,000,000 kW = 1,000,000,000 W

See also WikiPedia:Watt.