Professional electrical voltage drop calculations for single-phase and three-phase systems
Supports both single-phase and three-phase electrical systems
Calculate voltage drop for multiple parallel conductors per phase
Based on NEC Chapter 9 and Table 310.16 ampacity data
Download professional calculation reports with detailed formulas
Apply temperature correction factors for different ambient conditions
Accurate calculations accounting for inductive and capacitive loads
This voltage drop calculator is part of Sparky's SWAG (Sparky's Wonderful Application Gadgets), a collection of professional electrical engineering tools built with modern web technologies.
The calculator uses industry-standard formulas and NEC reference data to provide accurate voltage drop calculations for electrical circuits. All calculations are performed on a secure backend API and can be exported as professional PDF reports.