Voltage Drop Calculator

NBR 5410Single & Three-phaseΔV, ΔV%

Calculate ΔV and ΔV% for single-phase and three-phase circuits per NBR 5410. Copper or aluminum, power factor support and automatic compliance check against the normative limits of 4%, 5% or 7% based on the supply source.

1Voltage and network

Network type

Nominal voltage

2Conductor and load

Conductor material

Conductor cross-section

Select cross-section in mm²...

Current

Circuit length

One-way distance only (source to load)

Power factor (cos φ)

Use 1.00 for resistive loads (heating, lighting). Inductive motors typically 0.80–0.92.

Power source

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