Voltage Drop Calculator
Calculate voltage drop in electrical wiring based on wire gauge, length, current, and material. Ensure your circuits meet NEC recommendations.
Inputs
V
A
ft
Results
Voltage Drop
4.76 V
Voltage Drop %3.97%
Voltage at Load115.24 V
Wire Resistance0.32 Ω
Power Loss71.46 W
AssessmentMarginal (3-5%)
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Formula
Voltage Drop = Current × Wire Resistance. Wire Resistance = (Resistivity × 2 × Length) / 1000. NEC recommends ≤3% drop for branch circuits.Related Calculators
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