Conduit Fill NEC Chapter 9
Conduit Fill NEC Chapter 9 Summary
Conduit Fill NEC Chapter 9 is a free, ad-supported, with in-app purchases Android app in Tools by ZkDev. Released in Feb 2026 (5 months ago). It has about 175+ installs Based on AppGoblin estimates, it reaches roughly 29 monthly active users and generates around $<10K monthly revenue (70% IAP / 30% ads). Store last updated Jun 13, 2026
Recent activity: 12 installs this week (48 over 4 weeks) showing exceptional growth View trends →
Conduit Fill NEC Chapter 9 SDKs Summary
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App Description
NEC conduit fill calculator. 13 raceways, 15 wire types, nipple mode. Offline
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.