Voltage Drop Calculator

Calculate voltage drop in electrical wires based on NEC standards.

Circuit Parameters

Source Voltage (V)

Current (Amps)

One-Way Length (feet)

Wire Gauge (AWG)

Conductor Material

Phase Type

Voltage Drop

4.76

Volts Drop

3.97%

Percentage

⚠ Marginal (3-5%)

Results

Voltage at Load115.24 V

Power Loss71.46 W

Total Wire Resistance0.3176 ohms

Wire Resistance1.588 ohms/1000ft

Maximum Wire Length

For 3% Drop (NEC Branch)76 ft

For 5% Drop (NEC Total)126 ft