Good
Good start excited to so where he takes it.
Response from developer
happy to hear 😎
Free
In-App PurchasesWith Ads
About
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.
✓Box fill calculations
✓Conduit fill calculations
✓Wire volume data
✓Supports multiple conduit types
✓Supports device counts and clamps
✓Offline functionality
✓Clean, simple interface
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What's New in NEC Box & Conduit Calc
1.8
July 19, 2026
• Cleaner layout and faster experience across calculators and reference tables • Bug fixes and performance improvements
1
In-App Purchases
$4.99
NEC Box Conduit Calc Pro
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FAQ
What is NEC Box & Conduit Calc?
NEC Box & Conduit Calc is a utility app designed to accurately calculate electrical box fill and conduit fill according to the National Electrical Code (NEC). It provides instant results and clear breakdowns to save time for professionals and students in the electrical field.
Who is NEC Box & Conduit Calc for?
This app is perfect for electricians, electrical contractors, inspectors, engineers, designers, students, and apprentices who need to perform NEC-compliant fill calculations.
Does NEC Box & Conduit Calc work offline?
Yes, NEC Box & Conduit Calc is designed to work offline, making it a reliable tool for use in the field where internet connectivity may be limited.
What types of boxes and conduits does NEC Box & Conduit Calc support?
The app supports all common box sizes and types, and for conduits, it supports EMT, PVC, RMC, IMC, and more. It also allows for the selection of multiple conductor sizes per conduit.
How accurate are the calculations in NEC Box & Conduit Calc?
The app is built for accuracy according to the NEC, providing NEC-compliant volume calculations for boxes and NEC-based fill percentages for conduits. It includes a built-in AWG wire volume reference.
Does NEC Box & Conduit Calc have ads?
Yes, the free version of NEC Box & Conduit Calc contains subtle advertisements. Users can upgrade to the Pro version to remove ads and unlock future features.
What are the pricing details for NEC Box & Conduit Calc?
The app is free to download and use, supported by ads. There is an option to upgrade to a Pro version to remove ads and access additional features.
On what devices can I use NEC Box & Conduit Calc?
NEC Box & Conduit Calc is available for iPhone and iPad devices, making it accessible for a wide range of Apple users in the electrical trade.
