Welcome to the NEC Conduit Sizing and Fill Quick Calculators

These calculators provide you with the NEC conduit sizing and fill requirements only

Conduit Size Calculator (NEC)

Number of Conductors Size of Conductors Type of Insulation Calculated Area

Total Area 0
Conduit Type
Minimum Conduit Size
% Fill


Max. Conduit Fill Calculator (NEC)

Unit Selection Max. # Conductors
Conduit Size
Insulation Type
Conduit Type
Cable Size


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