Voltage Drop Calculator.

Voltage Drop Calculator is a dual-standards tool for NEC and IEC calculations on the job. Enter voltage, current, run length, and power factor to get detailed results for copper or aluminum conductors in single- and three-phase systems. It supports continuous load corrections, grouping, ambient temperature adjustments, ampacity and derating, and automatic compliance checks (branch circuits ≤ 3%).

Wire Size Calculator (Reverse) computes the required conductor size to target a voltage drop percentage, suggesting optimal AWG, kcmil, or mm² using NEC Chapter 9 Table 9 (AC impedance) with a DC fallback. The suite includes a wire converter, PDF reports, electrical formula cards, and localization in multiple languages for professionals worldwide.