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Wire Gauge (AWG) Voltage Drop & Ampacity Sizing Calculator

Calculate voltage drop percentage, conductor resistance, and NEC recommended wire gauge sizing for single-phase AC/DC electrical circuits.

Inputs used by this tool

Enter values in the interactive controls when the page loads. The result depends on the assumptions and units shown for each field.

Input type: number
Input type: number
Input type: number
Input type: select

Data handling varies by tool. Review its notes and the Privacy Policy before entering sensitive information.