Voltage Drop Calculator
Estimate voltage loss for low-voltage and electrical circuits.
Results
Estimated voltage drop0.794 V
Voltage drop %6.62%
Voltage at load11.206 V
Circuit resistance0.1588 Ω
StatusHigh Drop
Assumptions
Uses a common one-way distance formula with two conductors and approximate ohms-per-1000-ft tables for copper and aluminum at about 20°C. Status bands: Good ≤3%, Moderate ≤5%, High >5%.
Results are estimates and should not replace applicable electrical codes, manufacturer specifications, engineering requirements, or local regulations.
Example
12 V system, 5 A, 50 ft one-way on 12 AWG copper shows roughly 0.79 V drop (~6.6%) — high drop for many low-voltage loads.
FAQ
- Is this an engineering certification?
- No. It is a field estimate tool only.
- What gauges are supported?
- Common AWG sizes from 18 through 0000 for copper and aluminum.