NEC Box & Conduit Calc
No in-app products collected for this app.
| Rating | |||
|---|---|---|---|
| United States | 86%19 | 4.89 | |
| Canada | 5%1 | 5.00 | |
| Costa Rica | 5%1 | 5.00 | |
| Mexico | 5%1 | 5.00 | |
| United Arab Emirates | <1%0 | — | |
| Afghanistan | <1%0 | — | |
| Antigua And Barbuda | <1%0 | — | |
| Anguilla | <1%0 | — | |
| Albania | <1%0 | — | |
| Armenia | <1%0 | — |
Description
NEC Box & Conduit Calc is the fastest, most accurate way to calculate box fill, conduit fill, required conduit size, and wire volume — all to the NEC (National Electrical Code).
Built for electricians, contractors, engineers, inspectors, and apprentices, it delivers instant, code-compliant results that save time on every job — right from your pocket, even offline.
Key Features
Box Fill Calculator
Device counts, equipment grounding, internal clamps
All common box sizes and types
NEC-compliant volume with clear breakdowns
Conduit Fill Calculator
EMT, PVC, RMC, IMC & more
Multiple conductor sizes per conduit
NEC fill percentages with instant pass/fail
Required Conduit Size
Enter your conductors, get the correct conduit size instantly
See the next size up and down
NEC Reference Tables
Chapter 9 Tables 1, 4 & 5 at your fingertips
Browse every NEC box and conduit size
Accurate Wire Volume Data
Built-in AWG volume reference for field, shop, and inspection
Professional PDF Reports
Export clean, shareable reports for your records or the inspector
Clean, Simple Interface
Designed for electricians under time pressure
Easy to use with gloves
Works fully offline
Perfect For
Electricians
Electrical contractors
Students & apprentices
Inspectors
Engineers & designers
Download now and get code-compliant fill calculations in seconds — on every job.