NEC Box & Conduit Calc

NEC Box & Conduit Fill

Free · In‑App Purchases · Designed for iPad

NEC Box & Conduit Calc is the most accurate way to calculate box fill, conduit fill, and wire volume according to the NEC (National Electrical Code). Built for electricians, electrical contractors, engineers, inspectors, and students — this app provides instant, reliable fill calculations that save time on every job. Key Features • Box Fill Calculator – Supports device counts, equipment grounding, internal clamps – Includes all common box sizes and types – NEC-compliant volume calculations – Instant results with clear breakdowns • Conduit Fill Calculator – Supports EMT, PVC, RMC, IMC & more – Choose multiple conductor sizes per conduit – NEC-based fill percentages – Quickly see pass/fail results • Accurate Wire Volume Data – Built-in AWG volume reference – Perfect for field, shop, and inspection work • Clean, Simple Interface – Designed for electricians under time pressure – Easy to use with gloves – Works offline • Ads Support (with Pro Upgrade option) – Free to use with subtle ads – Upgrade to Pro to remove ads and unlock future features Perfect For • Electricians • Electrical contractors • Students & apprentices • Inspectors • Engineers & designers

Ratings & Reviews

  • 5.0
    out of 5
    7 Ratings

New: Optional extension ring support in box fill, with NEC‑correct math and PDF reports.

Version 1.5

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

Privacy practices may vary, for example, based on the features you use or your age. Learn More

Accessibility

The developer has not yet indicated which accessibility features this app supports. Learn More

Information

  • Seller
    • V PUGAZHENTHI
  • Size
    • 53.3 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.
  • Languages
    • English and Spanish
  • Age Rating
    4+
  • In-App Purchases
    Yes
  • Copyright
    • © All rights reserved
  • Developer Website
  • Privacy Policy

    • More by V PUGAZHENTHI