Box Fill Pro - Electrician

NEC 2023 Box Fill Calculator

Only for iPhone

Free · In‑App Purchases · Designed for iPhone. Not verified for macOS.

iPhone

NEC 2023 box fill calculator for electricians. Calculates conductor, device, and fitting allowances per Article 314.16. Pass/Fail verdict. Offline. One-time purchase. Box Fill Pro calculates electrical box fill per NEC 2023 Article 314.16 — the code section that determines how many wires, devices, and fittings can legally fit in a junction or device box. Works offline. No subscription. One-time purchase. WHAT IT CALCULATES - Line-voltage conductors by AWG gauge (14, 12, 10, 8, 6) - Equipment grounding conductors (all EGCs combined = one allowance, per 314.16(B)(5)) - Internal cable clamps (all clamps = one allowance, per 314.16(B)(2)) - Luminaire studs and hickeys - Strap-mounted devices (switches, receptacles) VERDICTS BACKED BY CODE Compares your fill total against NEC Table 314.16(A) box capacities. Get an instant PASS or FAIL — and a suggested upgrade if you're overfilled. BUILT FOR THE FIELD No ads. No cloud. No account required. Designed for electricians who need the answer in seconds, not after a signup flow. PART OF THE FIELDMETRIC SUITE Also available: Conduit Fill Pro (NEC conduit fill calculations).

Ratings & Reviews

  • This app hasn’t received enough ratings or reviews to display an overview.

The developer, BRUCE RAY MCCAMPBELL, 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 Not Collected

    The developer does not collect any data from this app.

    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
    BRUCE RAY MCCAMPBELL
    Size
    50.8 MB
    Category
    Utilities
    Compatibility
    Requires iOS 15.1 or later.
    • iPhone
      Requires iOS 15.1 or later.
    • iPod touch
      Requires iOS 15.1 or later.
    • Mac
      Requires macOS 12.0 or later and a Mac with Apple M1 chip or later.
    Languages
    English
    Age Rating
    4+
    In-App Purchases
    Yes
    Copyright
    © 2026 FieldMetric
  • Privacy Policy

    • More by BRUCE RAY MCCAMPBELL

    You Might Also Like