🔌Voltage Drop Calculator

Calculate voltage drop and percentage voltage drop for AC single-phase, AC three-phase, and DC circuits. Uses NEC Table 9 data or resistivity-based estimation.

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Calculation Method

Wire Material

Wire Size

Conduit Material

Resistance per metre (mΩ/m)

Reactance per metre (mΩ/m) — 0 for DC

Supply Voltage (V)

Phase / Circuit Type

Power Factor (PF) — AC only

Number of Parallel Conductor Sets

One-Way Distance

Distance Unit

Load Current (Amps)

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