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Home Tools Voltage Drop12V 20A 20ft AWG 8 voltage drop

Voltage Drop

12V 20A 20ft AWG 8 voltage drop

Compute the voltage drop for a 12V 20A load over 20ft of AWG 8 copper wire. Free, instant, browser-based.

100% Client-SideYour Data Stays LocalNo Account Required

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About this page

This page wraps the Voltage Drop Calculator for the most-searched compute variant: 12V 20A 20ft AWG 8 voltage drop. The values below are pre-filled so the answer is immediately visible; use the tool above to compute any other value.

System

Wire material

Current (A)

Length (ft, one-way)

Wire gauge

Voltage drop

2.382 V

% of nominal

1.99%

End voltage

118 V

Within the 3% recommended limit for 120V systems.

Round-trip length (out + back) is used. Single-phase: V_drop = 2 × I × R × L. Three-phase: V_drop = √3 × I × R × L. All math runs in your browser.