Formula: Power = voltage times amperage. So, if you have 120 volts: the power 120 volts times 1 ampere equals 120 watts.
http://wiki.answers.com/Q/What_is_5kv_equals_watts

The conversion of Watts to Amps is governed by the equation Amps = Watts/Volts. 12
http://www.chacha.com/question/howmanywattsare...

To compute, Amperage (I) also known as Current is equal to Voltage Amp (VA) also known as Watt divided by Volt (V). Or simply, I = VA / V.
http://www.kgbanswers.com/howmanyampsequalswat...

That depends on circuit voltage. 1 watt is equal to 1 volt times 1 amp.
http://wiki.answers.com/Q/How_many_watts_is_1.2_am...
