# Conduit Fill Calculator-NEC

> NEC Chapter 9 Pipe Fill

Canonical page: [https://chrome-stats.com/d/id6761846849](https://chrome-stats.com/d/id6761846849)

## Overview

- **ID:** `id6761846849`
- **Platform:** Apple
- **Type:** Apple app
- **Status:** Available
- **Publisher:** Rizvan Adzhoian
- **Category:** Utilities
- **Rating:** 5.00 / 5 (1 ratings)
- **Version:** 1.2.0
- **Last updated:** 2026-06-13
- **First published:** 2026-04-23
- **Size:** 34 MB
- **Data as of:** 2026-09-22
- **Store listing:** [Apple App Store](https://apps.apple.com/us/app/conduit-fill-calculator-nec/id6761846849)
- **Website:** [https://tradetools.dev/](https://tradetools.dev/)
- **Privacy policy:** [https://tradetools.dev/privacy-policy.html](https://tradetools.dev/privacy-policy.html)

## Description

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.

## Rankings

- #848,359 — Overall

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Source: [Chrome-Stats](https://chrome-stats.com/d/id6761846849)