NEC Box Fill Calculator
Fast NEC 2026 Calculations
Only for iPhone
Free · In‑App Purchases · Designed for iPhone. Not verified for macOS.
iPhone
The fastest NEC® Box Fill Calculator for professional electricians.
Stop flipping through tables.
Calculate NEC® 2023 box fill instantly with a clean, modern interface designed specifically for electricians.
Whether you're working in residential or commercial installations, NEC Box Fill Calculator helps you verify box capacity quickly and confidently.
Features
• Instant live calculations
• NEC® 2023 compliant calculations
• Visual capacity gauge
• Smart box recommendations
• Common electrical box catalog
• One-handed operation
• Professional Apple-inspired interface
• No ads
• Works offline
Perfect for
• Licensed Electricians
• Electrical Contractors
• Apprentices
• Inspectors
Designed for speed.
Built for professionals.
Privacy Policy : https://autumn-jackrabbit-155.notion.site/3a4c2750335a8037a91ed5e6c277574d
Significant payment and user experience improvements
The developer, Hilal Demir, 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 Linked to You
The following data may be collected and linked to your identity:
- Purchases
- Identifiers
- Usage Data
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- Hilal Demir
- Size
- 11.8 MB
- Category
- Utilities
- Compatibility
Requires iOS 18.0 or later.
- iPhone
Requires iOS 18.0 or later. - Mac
Requires macOS 15.0 or later and a Mac with Apple M1 chip or later.
- iPhone
- Languages
- English
- Age Rating
4+
- 4+
- In-App Purchases
Yes
- NEC Box Fill Calculator Annual $29.99
- NEC Box Fill Calculator $4.99
- Copyright
- © 2026 Hilal Şahin Demir