Voltage Drop Calculator
Calculate voltage drop in electrical wires based on NEC standards.
Circuit Parameters
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
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Editorial Note
MyCalcBuddy Editorial Team
This page is maintained as an educational calculator reference.
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Formula Source: Standard Mathematical References
by Various
🔄Last reviewed: May 2026
✓Formula checks are based on standard references and internal QA review.