NEC Box & Conduit Calc
NEC Tools for Electricians
Free · In‑App Purchases · Designed for iPad. Not verified for macOS.
NEC-based conduit fill, box fill & sizing in seconds. Now with a cleaner, faster experience. Go Pro for unlimited calculations — no ads, ever.
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.
• Cleaner layout and faster experience across calculators and reference tables
• Bug fixes and performance improvements
The developer, V PUGAZHENTHI, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Used to Track You
The following data may be used to track you across apps and websites owned by other companies:
- Location
- Identifiers
- Usage Data
Data Linked to You
The following data may be collected and linked to your identity:
- Location
- Identifiers
- Usage Data
Data Not Linked to You
The following data may be collected but it is not linked to your identity:
- Diagnostics
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- V PUGAZHENTHI
- Size
- 76 MB
- Category
- Utilities
- Compatibility
Requires iOS 17.6 or later.
- iPhone
Requires iOS 17.6 or later. - iPad
Requires iPadOS 17.6 or later. - Mac
Requires macOS 14.6 or later and a Mac with Apple M1 chip or later. - Apple Vision
Requires visionOS 1.3 or later.
- iPhone
- Languages
- English and Spanish
- Age Rating
4+
- 4+
- Contains
Advertising
- In-App Purchases
Yes
- NEC Box Conduit Calc Pro $6.99
- Copyright
- © All rights reserved