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QuickNEC

Professional NEC 2023 Calculator & Reference

For Electricians, Engineers & Inspectors

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See QuickNEC in Action

QuickNEC Home Screen
Conduit Fill Calculator with Pass Result
Wire Ampacity Calculator with Detailed Breakdown
NEC Tables Browser
Inspector Mode with Enhanced Formatting

Built for Professionals

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Professional Calculators

Conduit Fill, Wire Ampacity, Voltage Drop, and Grounding calculators with instant NEC references

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NEC Table Browser

Browse and search all NEC reference tables. Bookmark frequently used tables for quick access

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Inspector Mode

Professional formatting with enhanced NEC references and clear pass/fail indicators

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Favorites System

Save calculator configurations and share results via native iOS share sheet

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100% Offline

No internet required. Fast full-text search across all NEC content

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Native iOS Design

SwiftUI interface optimized for dark mode with haptic feedback and VoiceOver support

Four Essential Calculators

Conduit Fill

Calculate fill percentages per NEC Chapter 9 with instant pass/fail results

Wire Ampacity

Full derating with temperature and conductor adjustments based on NEC tables

Voltage Drop

Single-phase and three-phase support with detailed calculations

Grounding

EGC and GEC sizing per NEC 250.122 and 250.66

No Subscription Required

One-time purchase. All features included. No ads.

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Based on NEC 2023. Always verify with current code book and local amendments.