Electrical Wire Size Calculator

This should be used as a reference only. Please check with your electrical inspector or a licensed electrician for the proper wire size. There are many factors to consider before choosing the proper gauge.

wire size

wire size


Wire Size
Required Data Entry
Wire TypeCopperAluminum
Circuit PhaseSingle PhaseThree Phase
Circuit Voltage120208240277480
One Half The Total Circuit Length
Total Circuit Amperage

Calculated Results
Required Minimum Wire Size