Best Electriciancalc Nec Calculator Apps

NEC Mastery

8000+ Questions & Explanations

Free

Prepare for electrician certification exams with over 8,000 practice questions and detailed explanations. Access a comprehensive quick reference guide and 20 professional NEC calculators for on-the-job use. Track work hours with a built-in log for state board submissions.

ConduitLab: NEC Calculator

NEC Voltage Drop & Fill Calc

Free

This app provides professional NEC electrical calculations for electricians and engineers. It features ampacity, voltage drop, and conduit fill calculations, with a unique 2D visualizer to see conductor layouts. Generate inspector-ready PDF reports for documentation and record-keeping.

MasterElec - NEC Code Guide

Electrical Voice Assistant

Free

A voice-powered assistant for electricians that provides offline access to NEC references and professional calculators. Quickly get answers to code questions and perform calculations without needing an internet connection.

Dakota's Electrical Calculator

Voltage Drop, Conduit & Wire

Free

This app provides electricians and apprentices with essential tools for on-the-job tracking and NEC-aligned calculations. It helps with circuit analysis, load calculations, conduit fill, motor and transformer computations, and voltage drop assessments for field use and exam preparation.

Voltage Drop Calculator.

Wire Size, NEC & IEC Tools

Free

Calculate voltage drop and wire size using both NEC and IEC standards. Supports various load types, conductor materials, and system configurations. Generates detailed reports for electricians, engineers, and contractors.

NG Wire: NEC Ampacity & Fill

Grounding Size, Motor, & Cover

Free

This app provides electrical construction professionals with quick access to National Electric Code® (NEC®) tables and calculations for wire, conduit, and motor data. It streamlines complex calculations for efficient and accurate results in the field or office.

National Electricians Calc

#1 Electrical Calculator

Free

This app provides electricians with fast, reliable electrical calculations for the jobsite. It offers practical tools for conduit fill, ampacity, voltage drop, and more, ensuring consistent results quickly. Designed for professionals who need dependable tools without unnecessary features.

NEC Box & Conduit Calc

NEC Tools for Electricians

Free

Calculate electrical box and conduit fill accurately according to the NEC. This app provides instant, reliable calculations for electricians, contractors, and students, saving time on job sites. It offers support for various box and conduit types, conductor sizes, and includes wire volume data.

SparkGuide - NEC Companion

An Electricians one stop shop

$4.99

This app provides electricians with quick access to the 2026 National Electrical Code. It features lightning-fast search, practical job guidance, essential formulas with calculators, and a visual library of electrical components. Designed for field use with offline access and a rugged interface.

Electric Master: NEC Panel

Wire Size, Box Fill & Schedule

Free

This app provides a suite of electrical calculation tools for professionals, offering NEC-compliant solutions for wire sizing, voltage drop, and more. It works offline and allows for PDF export of results with custom branding.

Mike Holt's Electrical Toolbox

Electrical Power Calculator

Free

This app provides essential calculations for electricians, inspectors, contractors, and engineers. It helps determine conductor sizing, circuit protection, race sizing, and grounding conductor sizes for various electrical equipment and services.

FieldVolt Electrical

Electrical Field Calculator

Free

This app assists electricians with complex calculations for pipe bending, conduit fill, ampacity, voltage drop, and box fill. It also offers a professional subscription for expert electrical advice and troubleshooting.