Conductors

Conductor Resistance Calculator

Calculate a conductor's resistance from its resistivity, length, and cross-sectional area (R = (ρ × L) ÷ A).

Wire Resistance Per Length Calculator

Calculate a wire's resistance per 1000 ft from its total resistance and length (R/1000ft = (R ÷ L) × 1000).

Voltage Drop Resistance Calculator

Calculate the maximum conductor resistance for an allowable voltage drop and current (R = VD ÷ I).

Formula

Conductor Resistance Formula

The conductor resistance formula, its variables, and how resistivity, length, and cross-sectional area relate.

Example

Conductor Examples

Worked, step-by-step examples calculating conductor resistance, resistance per length, and maximum allowable resistance.

Guide

Understanding Conductor Resistance

What conductor resistance is, what affects it, and how it connects to voltage drop.