# Southwire® Conduit Fill Calc — user reviews > 47 indexed App Store user reviews of Southwire® Conduit Fill Calc by Southwire Company, rated 4.48/5 from 746 ratings. - Source: https://appshunter.io/ios/app/southwire-conduit-fill-calc/id509204523/reviews - App overview in markdown: https://appshunter.io/ios/app/southwire-conduit-fill-calc/id509204523.md - Rating breakdown: 5★ 543 · 4★ 49 · 3★ 20 · 2★ 23 · 1★ 44 ## What do users think of Southwire® Conduit Fill Calc? Overall sentiment: positive **Pros** - 🚀 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 - 💾 Customizable wire data entry - ⚡ Saves significant time on job sites - 🎯 Accurate calculations (when working properly) - 📱 Convenient mobile access to conduit fill information **Cons** - ⚠️ Accuracy issues reported by multiple users - ❌ Limited wire gauge options (missing 16 & 18 AWG) - 🔄 Changing conduit type erases conduit size - 📉 Jam probability calculations unreliable - 🗑️ No data persistence between calculations - 🐛 Blank screen crashes on older versions - ⚠️ Discrepancies with NEC standards calculations **Commonly reported bugs** - Blank white screen on app launch - Conduit size data erased when changing conduit type - Inaccurate fill calculations compared to NEC standards - Jam probability calculations not accurate - App crashes and fails to display results - No method to reload or recover from crashes **Most requested features** - Add 16 & 18 AWG wire sizes - Include bare solid copper and other conductor types - Save calculation history/results - Voltage drop calculator - Maximum wire count per conduit type calculator - Conduit length parameter - Restore calculate button functionality - Auto-fill missing fields ## Newest reviews (13 of 47) ### 3/5 — Good but slightly off *2025-10-25, version 2.3.1* Love the app except I’ve had others check me after I’ve used and found a small deficiency of accuracy not severe ### 4/5 — South wire *2023-07-24, version 2.1.14* Length of conduit would be helpful ### 3/5 — Decent app *2022-08-29, version 2.1.13* App isn’t bad for calculating conduit fill but the jam probability is not accurate at all ### 4/5 — KAR II *2022-05-24, version 2.1.13* Thanks for easy work ### 5/5 — ConduitFill *2021-08-20, version 2.1.11* I like the fact that I can build my one cable data if needed. ### 4/5 — No easy way to save *2021-02-14, version 2.1.11* Great calculator. Only complaint is that there isn’t a way to save a particular fill calculation. ### 2/5 — Data entry *2020-09-12, version 2.1.11* No way to retrieve a long data entry to do a different calculation with same data ### 5/5 — Have used this app for years! *2020-04-07, version 2.1.2* Great app for fill calculations ### 5/5 — Calc *2020-01-31, version 2.1.2* Good aplication ### 5/5 — Southwire Conduit Fill iOS13 *2019-11-08, version 2.1.2* Extremely Helpful day to day App. Makes Quick Work of Fill Calcs. Electrician since ‘96. Thanks Southwire! ### 5/5 — Love These *2019-02-08, version 2.0.4* I tip my hat. Great thanks to Southwire for allowing me such generous computing capabilities on my iPhone. Five stars earned. ### 5/5 — Journeyman electrician *2018-11-30, version 2.0.3* Great easy handy tool to have ### 4/5 — Works, but... *2018-07-28, version 2.0.2* The app really should have an option to tell you the total number of wires per type to said type of conduit. Rather than having to plug in all the numbers manually to find the max number ## Most critical reviews (10 lowest-rated) ### 1/5 — App doesn’t work *2024-01-23, version 2.1.15* Typed all info but no results!! ### 1/5 — This app will lie to you! *2022-05-17, version 2.1.13* Don’t use this app! I work as an electrician and used this app for a conduit fill on a nipple between two panels. I had (4) 350 xhhw and (1) 1/0 xhhw and it came out to 56% fill for a 2 inch emt. Used a 2 inch emt for my nipple and inspector called me on it. I calculated it out via 2020 nec and sure enough it came out to 67% fill over the 60% max. Made me look stupid and wasted time. We’re trained to trust our tools but apparently you can’t this one. ### 1/5 — Not per code *2020-06-25, version 2.1.6* Be careful this is not calculated per nec standards for wire sizes ### 1/5 — Last version was better *2019-08-26, version 2.1.1* Bring back the calculate button!!!! How dumb to get rid of it. ### 1/5 — Bring back the calculate button *2018-08-23, version 2.0.2* The old version was better. You didn’t need to have all the info as the app would fill it in when you pressed the calculate button. ### 1/5 — Open problems *2013-02-05, version 1.2* I download this app but when I open it a white screen appear, please fix it ### 1/5 — Chaucerna *2013-01-11, version 1.2* Blank screen is all I get when I open this app. ### 1/5 — Conduit fill *2012-03-27, version 1.0* Loaded program but when trying to run app, only a blank screen appears. No method to reload app. If Southwire doesn't send fix, this app is worthless. ### 2/5 — Basically Worthless *2025-08-02, version 2.3.1* The reason I say this is because we work with 0-10 lightning controls a lot, which means that without 16 & 18 awg, this utility is incomplete. Disappointing really… ### 2/5 — clumsy user interface with limited options *2022-05-24, version 2.1.13* Changing the conduit type erases the conduit size. Many common conductor sizes and types are omitted such as bare solid copper and other that Southwire sells. ## Most praised reviews (10 highest-rated) ### 5/5 — Awesome app *2026-06-26, version 2.5* Quick and easy. Can’t mess it up. That’s what you need in the field. ### 5/5 — Florida *2026-02-07, version 2.3.1* My go to app for quick calculations ### 5/5 — Amazing *2025-07-17, version 2.3* This app is simple to use and works. Ask Google about wire fill and you get an answer based on people’s opinion which is mostly wrong. This app calculates it and you know exactly if you’re good to go or not. ### 5/5 — Very Helpful *2025-05-10, version 2.3* Best part about the app is you can add as many different sized wires as you want. Online you can only use one size at a time. ### 5/5 — Helpful in the field *2024-12-08, version 2.2.2* Thanks for the wire,conduit fill for new code requirements on fillet thanks south wire very helpful on decision making and doing things the correct way ### 5/5 — Great app for quickly calculating conduit fill. *2024-07-23, version 2.1.15* The app is extremely easy to use and immediately shows the actual percentage of fill. It also flags whether fill exceeds NEC requirements. With spin wheel fields for each variable, selections are quick, easy and accurate. Thanks for making this available to customers. ### 5/5 — Conduit fill *2024-07-23, version 2.1.15* Excellent app easy to use and saves you soo lots of time. ### 5/5 — South wire Conduit Fill App *2023-11-13, version 2.1.15* This app is so quick and easy. Gives you the option to punch in the numbers of your wire properties. For example the wire, size, insulation, AWG , and stranded or solid. It tells you the probability of a jam. All you have to do is put the numbers in. Great app. Highly recommend it. ### 5/5 — Bill P *2022-07-30, version 2.1.13* Excellent tool to use as a Building Inspector ### 5/5 — I feel like a professional *2022-02-24, version 2.1.12* I love this app, perfect for DIY. --- *Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-08-22.*