For AC circuits, in addition to the voltage drop due to resistance of the conductors (IR), the flow of reactive power (Vars) causes additional voltage drop across the line inductive reactance (IX).

AC Voltage Drop Calculation Formula

The approximate formula for calculating the AC voltage drop from Line to Neutral is:

Voltage drop Line-Line is given by:

AC Voltage Drop Calculator Considering Power Factor

Load power factor affects voltage drop. The calculator below takes in to account the loading of the circuit, conductor parameters, load power factor, circuit length to calculate the voltage drop. Line-Line, Line-Neutral voltage drops are provided along with the percentage (%) voltage drop.

To read more about voltage drop in AC circuits and to understand the effect of power factor click here.