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Best Electrical Conduit Sizing App

221+ iOS apps curated and reviewed

4.6 avg rating
17 free apps
Updated June 2026

Every iPhone needs a few good electrical conduit sizing app. We benchmark 221+ of them on App Store rating, freshness, and pricing, then surface the standouts so you don't have to scroll the App Store yourself.

Compare top Electrical Conduit Sizing App (June 2026)

#AppPriceRatingAdsIn-App PurchasesUpdated
1Southwire® Conduit Fill CalcSouthwire® Conduit Fill CalcFree4.5★ (746)NoNoJul 2026
2QuickBend: Conduit BendingQuickBend: Conduit Bending$6.994.8★ (3.8K)NoNoJul 2026
3Mike Holt's Electrical ToolboxMike Holt's Electrical ToolboxFree4.6★ (197)NoNoJun 2026
4Ugly's Electrical ReferencesUgly's Electrical References$12.994.4★ (1.5K)NoNoJul 2026
5NEC Box & Conduit CalcNEC Box & Conduit CalcFree4.9★ (17)YesYesJun 2026
6ArcSite: Floor Plans and CADArcSite: Floor Plans and CADFree4.7★ (8.6K)YesYesJul 2026
7Conduit Bender Elite - CalcConduit Bender Elite - Calc$7.994.8★ (1.6K)NoYesJul 2026
8Master Electrician Ref. LiteMaster Electrician Ref. LiteFree4.7★ (2.4K)NoNoJul 2026

Top Picks for Electrical Conduit Sizing App

Southwire® Conduit Fill Calc#1

Southwire® Conduit Fill Calc by Southwire Company

Editor's Choice
🔧 Utilities
4.5😊(746 ratings)
Free
Southwire® Conduit Fill Calc screenshot 1
Southwire® Conduit Fill Calc screenshot 2
Southwire® Conduit Fill Calc screenshot 3

This tool assists electricians, engineers, and contractors in determining the correct conduit size based on NEC guidelines. It calculates conduit fill percentages and jam probability, saving time compared to manual calculations.

What We Love

  • 🚀 Quick and easy calculations
  • 👍 User-friendly interface with spin wheel controls
  • 📊 Shows actual fill percentage and NEC compliance
  • 🔧 Ability to add multiple wire sizes simultaneously

Room to Improve

  • ⚠️ Accuracy issues reported by multiple users
  • ❌ Limited wire gauge options (missing 16 & 18 AWG)
  • 🔄 Changing conduit type erases conduit size
QuickBend: Conduit Bending#2

QuickBend: Conduit Bending by Bret Hardman

Conduit Bending Calculator
Strong Contender
📊 Productivity
4.8😊(3.8K ratings)
$6.99
#2in Productivity
QuickBend: Conduit Bending screenshot 1
QuickBend: Conduit Bending screenshot 2
QuickBend: Conduit Bending screenshot 3
QuickBend: Conduit Bending screenshot 4
QuickBend: Conduit Bending screenshot 5
QuickBend: Conduit Bending screenshot 6

This app is a conduit bending calculator designed for electricians and DIY enthusiasts. It provides accurate measurements for various bend types, accounting for bender and conduit specifications. Users can input data intuitively and receive instant feedback on bend feasibility.

What We Love

  • 🚀 Efficient and accurate conduit bending
  • 👍 Intuitive and user-friendly interface
  • 🔒 Comprehensive bending options and details
  • 💡 Helpful for apprentices and experienced benders

Room to Improve

  • 🐛 Occasional crashes or glitches
  • 🔧 Some features not as accurate as expected
  • 💡 Lack of visual aids like videos or diagrams

More Electrical Conduit Sizing App apps to explore

4
Ugly's Electrical References
Ugly's Electrical References
Ugly's Electrical References
by Informed Publishing
$12.99

This app provides electricians and electrical professionals with up-to-date digital information based on the National Electrical Code. It includes formulas, wiring diagrams, conduit bending guides, and calculators for various electrical calculations. The app is designed for on-the-job reference and works offline.

NEC 2026 updatesMathematical formulas and calculatorsConduit bending guide with videos
📊 Productivity
(1.5K)
paid
5
NEC Box & Conduit Calc
NEC Box & Conduit Calc
NEC Box & Conduit Calc
NEC Box & Conduit Fill
Free

Calculate electrical box and conduit fill accurately according to the NEC. This app provides instant, reliable calculations for electricians, contractors, and students, saving time on job sites. It offers support for various box and conduit types, conductor sizes, and includes wire volume data.

Box fill calculationsConduit fill calculationsWire volume data
🔧 Utilities
(17)
free with in-app purchases
6
ArcSite: Floor Plans and CAD
ArcSite: Floor Plans and CAD
ArcSite: Floor Plans and CAD
Sketch, Draw & Remodel On-Site
Free

This app allows contractors to create accurate floor plans and site layouts directly on-site. It streamlines the process of planning remodels, running takeoffs, generating professional proposals, and collecting payments, all from a mobile device.

Sketch accurate floor plans on-sitePlan remodels and renovationsRun takeoff and generate material lists
📊 Productivity
(8.6K)
free with in-app purchases
7
Conduit Bender Elite - Calc
Conduit Bender Elite - Calc
Conduit Bender Elite - Calc
Calculator for Electricians
$7.99

This app is a specialized calculator for electricians to simplify conduit bending calculations. It offers detailed diagrams and step-by-step guidance for various bend types, helping users save time and focus on installation. Users can customize settings for different conduit sizes and units of measurement.

Conduit bending calculationsDiagrams and step-by-step helpMultiple bend types supported
🔧 Utilities
(1.6K)
free with in-app purchases
8
Master Electrician Ref. Lite
Master Electrician Ref. Lite
Master Electrician Ref. Lite
A handbook for electricians
Free

This electronic pocket reference guide provides essential information for electrical professionals. It offers calculations, code tables, and detailed sections on motors, ampacities, grounding, and more, all accessible on your mobile device.

Motor and wiring informationAmpacity tablesConduit fill and grounding sizes
📊 Productivity
(2.4K)
paid
9
Electrical Toolkit by HCP
Electrical Toolkit by HCP
Electrical Toolkit by HCP
Conduit + load calcs for pros
Free

This comprehensive mobile toolkit provides electricians and professionals with essential calculations, NEC-compliant tools, and field utilities. It offers features for conduit bending, fill calculations, load analysis, and various electrical calculators, all designed for speed and clarity.

Conduit bending calculationsNEC-compliant conduit fillResidential load calculations
🔧 Utilities
(18)
free
10
Southwire® Voltage Drop Calc
Southwire® Voltage Drop Calc
Southwire® Voltage Drop Calc
Southwire Calculator
Free

Calculate the appropriate wire size for electrical circuits. This tool helps determine wire size based on voltage drop and current carrying capacity, ensuring compliance with NEC ampacity limits.

Determine wire size for voltage dropCalculate voltage drop for conductor runsLimit wire size by voltage drop
🔧 Utilities
(1.5K)
free
11
Conduit Fill: NEC Calculator
Conduit Fill: NEC Calculator
Conduit Fill: NEC Calculator
Voltage Drop, Wire & Box Fill
Free

This professional calculator helps licensed electricians perform complex NEC code calculations for conduit fill, voltage drop, wire sizing, and more. It offers multiple NEC code years and provides inspector-ready PDF exports with project management features. Designed for offline use in the field.

16 NEC calculatorsNEC year-aware (2017-2026)Inspector citations on results
🔧 Utilities
(3)
free with in-app purchases
12
ServiceTitan Mobile
ServiceTitan Mobile
ServiceTitan Mobile
by ServiceTitan Inc.
Free

This app empowers plumbing, HVAC, and electrical contractors to enhance customer interactions and boost sales. It provides tools for dispatching, estimating, payment collection, and presenting options, streamlining technician workflows for improved business outcomes.

Customer experience enhancementSales performance improvementTechnician workflow optimization
🔧 Utilities
(1.6K)
free
13
Dakota's Electrical Calculator
Dakota's Electrical Calculator
Dakota's Electrical Calculator
Load, Conduit & NEC Calculator
Free

This app provides electricians and apprentices with essential tools for on-the-job tracking and NEC-aligned calculations. It helps with circuit analysis, load calculations, conduit fill, motor and transformer computations, and voltage drop assessments for field use and exam preparation.

On-the-job hour tracking by areaNEC-aligned circuit calculationsBranch, feeder, and service load calculations
📚 Education
(6)
free
14
Electrical Panel Designer
Electrical Panel Designer
Electrical Panel Designer
Switchboard Wiring Diagram
Free
$6.99 | 100% OFF

Design and assemble electrical panels with a comprehensive tool for electricians, designers, and homeowners. Create detailed wiring diagrams, route wires, and manage projects locally on your device. Features include a vast library of components and customizable labeling for clear documentation.

Electrical panel assemblyWire routingDevice library
🎨 Graphics & Design
(4)
freemium
15
Sparky AI: IBEW Test Prep
Sparky AI: IBEW Test Prep
Sparky AI: IBEW Test Prep
Aptitude Test & Interview Prep
Free

This app provides comprehensive preparation for the IBEW Aptitude Test and serves as a professional NEC reference for electricians. It features AI-powered code lookups, a full conduit bender calculator, and various field calculators. Access essential tools for the job site, including offline capabilities and dark mode.

IBEW Aptitude Test PrepAI-powered NEC code lookupFull conduit bender calculator
🔍 Reference
(24)
freemium
16
Wire Color Code
Wire Color Code
Wire Color Code
Electrical circuit colors
Free

This app helps electricians and DIYers identify electrical wire colors globally. It offers country-specific codes, a large circuit database, and quick search functionality. Customize colors for your projects and enjoy a user-friendly interface for efficient electrical panel wiring.

Global country-specific wire color codesExtensive circuit database (up to 1000 circuits)Quick search for phase colors
📊 Productivity
(654)
free with in-app purchases
17
Electrical Calculations
Electrical Calculations
Electrical Calculations
by Egal Net di Ettore Gallina
Free

This app provides a comprehensive suite of electrical calculations for professionals. It supports various international standards and offers detailed reports in PDF format. The tool covers wiring, power, motor, and electronic calculations, along with extensive conversion tables and resources.

Wire size and voltage drop calculationsPower, current, and resistance calculationsMotor performance and connection diagrams
📊 Productivity
(125)
free with in-app purchases
18
Electrician Handy Tool
Electrician Handy Tool
Electrician Handy Tool
All in one electricians tools
Free

This app provides electricians with essential tools for conduit bending, calculations, and quick reference. It simplifies electrical work with features like voltage drop calculation and a user-friendly fraction calculator.

Voltage drop calculatorConduit bending calculatorFraction calculator
📊 Productivity
(21)
free with in-app purchases
19
Con Edison
Con Edison
Con Edison
Manage your account on the go.
Free

Manage your utility account conveniently from your mobile device. This app allows you to securely pay bills, review your energy usage, and receive tips to reduce consumption. You can also report outages and easily contact customer support.

Secure sign-inBill reviewSecure payment
🔧 Utilities
(121K)
ad-supported
20
F.W. Webb Mobile Ordering App
F.W. Webb Mobile Ordering App
F.W. Webb Mobile Ordering App
Official app for F.W. Webb
Free

This app provides trade professionals with a mobile platform to shop for plumbing, heating, HVAC, electrical, and industrial supplies. It features powerful search tools, including image and voice search, barcode scanning, and easy account management for placing and tracking orders.

Product search with image and voice optionsBarcode scanning for instant pricingOrder tracking and management
🛍️ Shopping
(20)
free

FAQ about Electrical Conduit Sizing App

What is the best electrical conduit sizing app for iPhone?
Southwire® Conduit Fill Calc tops our electrical conduit sizing app ranking as of June 2026, with a 4.5-star average from 746 App Store ratings, and it's free to download.
Yes — 17 of the top electrical conduit sizing app we rank are free to download, including Southwire® Conduit Fill Calc and Mike Holt's Electrical Toolbox.
Southwire® Conduit Fill Calc has no ads and has no in-app purchases, according to its App Store listing as of June 2026.
We track 221+ electrical conduit sizing app on the iOS App Store as of June 2026, ranked by rating, recency, and analysis of real user reviews.
This app helps electricians, engineers, and contractors determine the correct conduit size by calculating the conduit fill percentage and jam probability according to NEC guidelines. It simplifies the process of answering the question, 'What size conduit do I use?'
Key features include calculating conduit fill percentages and jam probability based on NEC guidelines, easy navigation, and the ability to email your calculation results with a single click. It eliminates the need for manual calculations or referencing the NEC book.