Voltage Drop Calculator

Calculate voltage drop in electrical circuits.

Circuit Parameters

Source Voltage

V

Load Current

A

One-Way Distance

feet

Distance from panel to load

Wire Gauge

Phase

Wire Gauge Reference

1 AWG0.124 Ω/kft

2 AWG0.156 Ω/kft

4 AWG0.249 Ω/kft

6 AWG0.395 Ω/kft

8 AWG0.628 Ω/kft

10 AWG0.999 Ω/kft

12 AWG1.588 Ω/kft

14 AWG2.525 Ω/kft

NEC Guidelines

Branch circuits: max 3% voltage drop
Feeders: max 2% voltage drop
Total (feeder + branch): max 5%
Sensitive equipment: max 2%

Voltage Drop

Voltage Drop4.76 V

Drop Percentage3.97%

End Voltage115.24 V

Wire Resistance0.318 Ω

Exceeds Limit

Consider larger wire gauge