The standard unit of electrical power worldwide. Named after Scottish inventor James Watt (1736-1819), watts equals volts times amps (W=VA). For example, a 5-watt battery charger delivers 5 volts at 1 amp (5 times 1). Following are the common watt measurements:
Symbol Quantity of watts
kW thousand
MW million (megawatts)
GW billion (gigawatts)