Use this useful tool to convert power choosing one of the 14 units of measurment included in this app, that are:
Watt:
watt, petawatt, terawatt, gigawatt, megawatt, kilowatt, milliwatt, microwatt, nanowatt, picowatt, femtowatt, zeptowatt
Horsepower:
metric horsepower, mechanical horsepower
For every units of measurment are also included formulas to convert that unit as you want.