Electric power calculator Electric Power Calculator (P = V × I) Voltage (V): Volts (V) mV (millivolts) kV (kilovolts) Current (I): Amperes (A) mA (milliamperes) kA (kiloamperes) Power (P): Watts (W) mW (milliwatts) kW (kilowatts) MW (megawatts) Calculate Reset