Watts - Volts - Amps - Ohms Calculator. Enter watts: micro-watts (μW) milli-watts (mW) watts (W) kilo-watts (kW) mega-watts (MW) Enter volts: micro-volts (μV) milli-volts (mV) volts (V) kilo-volts (kV) mega-volts (MV) Enter amps: micro-amps (μA) milli-amps (mA) amps (A) kilo-amps (kA) mega-amps (MA) Enter ohms: ohms (Ω) kilo-ohms (kΩ) mega-ohms (MΩ)