Wire/Cable Voltage Drop Calculator Wire type: -- select -- Copper Aluminum Carbon steel Electrical steel Gold Nichrome Nickel Silver Resistivity (Ω·m): diameter size: AWG inch mm cable length (one way): feet meters Current type: DC AC - Single phase AC - Three phase Voltage in volts (V): Current in amps (A): Voltage drop in volts (V): Percentage of voltage drop (%): Wire resistance (Ω):