Professional calculation tools for electrical design and installation
Electrical Calculation Tools
Industry-standard electrical calculators for apprentice training and professional jobsite use
Pull Box Sizing
Interactive 3D visualization tool for pull box sizing with NEC Article 314 compliance checking.
Auxiliary Gutter Sizing
Size auxiliary gutters and surface wireways per NEC Article 366 conductor fill requirements.
Conduit Fill Calculator
Calculate conduit fill based on common conduit types, sizes and wire types.
Motor Horsepower Interpolator
Interpolate Motor Horsepower for motor without a HP rating on their nameplate per NEC 430.6(A).
EGC Sizing for Voltage Drop
Calculate EGC resizing for voltage drop per NEC Article 250.122(B).
Conduit Building App
Create conduits and racks and check multiple attributes like weight, ampacity, sizing, conduit fill, and more.
Why Use These Calculators?
Training Focused
Designed specifically for apprentice training and educational use
Mobile Ready
Optimized for mobile devices and jobsite use with offline capability