Voltage Drop Calculator

Helps determine the proper wire size for an electrical circuit based on the voltage drop and current carrying capacity of an electrical circuit.

Calculate Your Voltage Drop

Determines wire size to meet specific voltage drop limits or calculates voltage drop for a specific conductor run. When sizing conductors, calculations limits wire size to voltage drop and NEC ampacity. Southwire's Voltage Drop Calculator is designed for applications using AWG and KCMIL sizes only.

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System Parameters

Input Parameters