Conduit Fill Calculator-NEC

NEC Chapter 9 Pipe Fill

$0.99 · In‑App Purchases · Designed for iPad. Not verified for macOS.

NEC conduit fill calculator for electricians, apprentices, and electrical engineers. NEC conduit fill calculator for electricians, apprentices, and electrical engineers. Calculate conduit fill percentages instantly using official NEC Chapter 9 data - Tables 1, 4, and 5. This electrical raceway calculator supports all conduit types and wire sizes. Works 100% offline on the job site. Whether you're pulling THHN through EMT, running FMC to a motor, or sizing PVC for a big commercial run, this conduit fill calculator gives you accurate NEC-compliant results in seconds. Use it as your portable conduit fill chart and raceway fill reference, faster than looking up wire count tables manually - perfect for residential and commercial installations. CONDUIT FILL CALCULATOR FEATURES: - 13 conduit types: EMT, ENT, FMC, IMC, LFNC-A, LFNC-B, LFMC, RMC, PVC Schedule 40, PVC Schedule 80, PVC Type A, PVC Type EB, HDPE - Trade sizes from 3/8" through 6" - 15 wire insulation types: building wire (THHN/THWN-2, XHHW-2, THW, RHH/RHW-2, USE-2, TW), fixture wire (TFFN/TFN, PF, PGF, PAF, PTF, ZF, SF-1, SF-2, RFH-2, FFH-2, KF-1) and high-temperature FEP, FEPB, PFA, PFAH, TFE - Wire sizes: 18 AWG to 1000 MCM (16/18 AWG for fixture wire) - AWG and mm² (metric) wire display - NEC Table 1 fill rules: 53% (1 wire), 31% (2 wires), 40% (3+ wires) - Visual PASS/FAIL indicator with fill percentage - Shows how many more wires you can add - Auto-suggests the smallest conduit size that fits your wires - even when the current size already passes - Nipple mode: conduit nipples up to 24 in use the NEC 60% fill allowance (Chapter 9, Note 4) - Mix different wire sizes in the same conduit fill calculation PRO FEATURES (one-time purchase): - No ads - clean interface for professionals - Save conduit fill calculation history - Export calculations as PDF reports for permits and records - Dark theme support BUILT FOR ELECTRICIANS ON THE JOB SITE: This conduit fill calculator is designed by electricians, for electricians. The interface is clean, fast, and works with one hand. Add wires, see your fill percentage, and move on - no complicated menus or unnecessary features. ACCURATE NEC CONDUIT FILL DATA: All conduit and wire areas are sourced from the NEC Chapter 9. Conduit fill percentages follow NEC Table 1 rules exactly: - 1 wire: 53% maximum fill - 2 wires: 31% maximum fill - 3 or more wires: 40% maximum fill NEC TABLES INCLUDED: - NEC Chapter 9, Table 1 - Percent fill for conduit and tubing - NEC Chapter 9, Table 4 - Conduit dimensions and areas (EMT, ENT, FMC, IMC, LFNC, LFMC, RMC, PVC, HDPE) - NEC Chapter 9, Table 5 - Wire dimensions and areas (THHN, XHHW, THW, RHW, USE, TW, TFFN, PF, ZF, SF, RFH, KF, FEP, PFA, TFE) PERFECT FOR: - Licensed electricians doing conduit fill calculations daily - Electrical apprentices studying for journeyman exams - Electrical engineers and designers - Electrical contractors bidding commercial and residential jobs - NEC code exam preparation - Anyone who needs a fast, accurate conduit fill calculator - Conduit sizing and wire count on the job site OFFLINE & PRIVACY: - Works 100% offline - no internet needed on the job site - No account required - No data collection - your calculations stay on your device Simplify your conduit fill calculations on the job site.

Ratings & Reviews

  • 5.0
    out of 5
    1 Ratings

What's new: • 15 wire insulation types — added TFFN and the full fixture-wire family (PF, PGF, PAF, PTF, ZF, SF-1, SF-2, RFH-2, FFH-2, KF-1) plus high-temperature FEP, FEPB, PFA, PFAH, TFE • Added 16 AWG and 18 AWG sizes for fixture wire • Nipple mode: nipples up to 24 in fill to 60% (NEC Chapter 9, Note 4) • Auto-suggests the smallest conduit that fits — even when the current size passes • Bug fixes and stability improvements Send feedback to support@tradetools.dev.

Version 1.2.0

The developer, Rizvan Adzhoian, 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:

    • Identifiers

  • Data Not Linked to You

    The following data may be collected but it is not linked to your identity:

    • Identifiers
    • Usage Data
    • 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
  • Rizvan Adzhoian
Size
  • 35.8 MB
Category
  • Utilities
Compatibility
Requires iOS 13.0 or later.
  • iPhone
    Requires iOS 13.0 or later.
  • iPad
    Requires iPadOS 13.0 or later.
  • iPod touch
    Requires iOS 13.0 or later.
  • Mac
    Requires macOS 11.0 or later and a Mac with Apple M1 chip or later.
  • Apple Vision
    Requires visionOS 1.0 or later.
Languages
  • English
Age Rating
18+
  • 18+
  • Learn More
  • Contains
    Unrestricted Web Access
    Advertising
In-App Purchases
Yes
Copyright
  • © zkdev
  • Developer Website
  • Privacy Policy

    • More by Rizvan Adzhoian

    You Might Also Like