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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
Subdivisions and multiples of the watt using SI prefixes
|Subdivisions of the watt|
|Multiples of the watt|