Skip to main content
Calcimator

Voltage Drop Distribution Calculator

Calculate voltage drop across a distribution feeder.

Inputs

V
kVA
ft

Results

Voltage Drop

0.09%

End Voltage

12,458.7 V

Voltage Drop11.3 V
Load Current23.1 A
Line Loss0.5 kW
How to Use This Calculator
  1. Enter Source Voltage, Load, and Power Factor.
  2. Set Feeder Length, Conductor Size, and 4/0 AWG.
  3. Adjust 3/0 AWG, 2/0 AWG as needed.
  4. Review Voltage Drop (%) and End Voltage.
  5. Use Voltage Drop and Load Current (A) to inform your decision.

How the result changes with Source Voltage

Source VoltageVoltage DropEnd Voltage
3,6081.08%3,569 V
12,3280.09%12,316.6 V
22,7920.03%22,785.8 V
31,5120.01%31,507.5 V

What each input means

Source Voltage
Distribution line voltage.
Load
Total load on the feeder.
Power Factor
Load power factor.
Feeder Length
One-way length of the feeder.
Conductor Size
Conductor size (copper).
Phases
Number of phases in the feeder.

How this is calculated

Worked example, using the default values

  1. Identify Input Parameters
    4 parameters
    Source Voltage = 12470, Load = 500, Power Factor = 0.9, Feeder Length = 5000 = 6 input(s) provided
  2. Calculate Voltage Drop
    Voltage Drop
    0.09 = 0.09
  3. Calculate End Voltage
    End Voltage
    12458.7 = 12458.7
  4. Calculate Voltage Drop
    Voltage Drop
    11.3 = 11.3
  5. Calculate Load Current
    Load Current
    23.1 = 23.1

Related Calculators

The questions that sit next to this one — chosen by subject, including calculators filed under a different category.

Power Grid

Load Flow Calculator

Calculate power flow, losses, and voltage drop through transmission lines.

Power Grid

Transformer Loading Calculator

Calculate percent loading, hot spot temperature, and remaining life.

Electrical Engineering

Voltage Regulation Calculator

Calculate voltage drop, drop percentage, and receiving-end voltage for power cables with resistance and reactance.

Science & Engineering

Voltage Drop Calculator

Calculate voltage drop in electrical wiring based on wire gauge, length, current, and material. Ensure your circuits meet NEC recommendations.

Hobby Electronics

Wire Gauge Calculator

Wire AWG from current capacity and voltage drop.

More in Energy & Utilities.