Southwire Conduit Fill Calc calculates Conduit Fill % as per NEC Guidelines.
About Southwire® Conduit Fill Calc
Southwire® Conduit Fill Calc is a tools app developed by Southwire Company.
Download Statistics
Southwire® Conduit Fill Calc has been downloaded 190 thousand times. In the last 30 days, the app was downloaded 1.2 thousand times.
User Ratings
Southwire® Conduit Fill Calc is rated 4.00 out of 5 stars. The rating is based on 360 ratings.
App Information
Southwire® Conduit Fill Calc is FREE to download. The APK download size is 40.39 MB. The latest version available is 2.5. The last update was on June 15, 2026.
Technical Requirements
Southwire® Conduit Fill Calc requires Android 8.0+ or higher. The app has a content rating of Everyone. The app has been available on Google Play November 2012.
Description
Southwire has created this great tool to help electricians, engineers and contractors answer the question, “What size conduit do I use” per the NEC®, includes fill percentages and jam probability. If you do not have the NEC book handy or do not want to spend time manually calculating the Conduit Fill %, this is the right app for you.
The app provides quick and easy navigation. Enter the Conduit Type and Size and specify your conductors. The App will calculate the Conduit Fill % as per NEC Guidelines.
Southwire Company is North America’s leading manufacturer of wire and cable used in the distribution transmission of electricity. Throughout its history, our company has sought to deliver power through our products, our service and by helping empower our customers, employees and communities.
The App Answers the question, “What size conduit do I use” includes fill percentages and jam probability per the NEC®. With one click, you can email your results.
Recent changes: Improved navigation. Added new banner and improved the look of the button that takes you to the user-defined outer diameters screen.
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Comments on Southwire® Conduit Fill Calc for Android
★★★★★doug worth· May 25, 2022
Easy to use. Lets you know when not nec compliant. Fast. Love it.
★★★★☆R. Crewse· Dec 16, 2020
It's easy to use and so far accurate. My only problem is with the scrolling. It is finicky about where you must touch the screen to scroll correctly. I would recommend this app.
★★★★★Rodgerick Williams· Nov 11, 2025
Easy to use Best Conduit Fill App! I know I have been using this App for at least 10 years!🔥
★★★★☆John LaPointe· Feb 3, 2025
I also cannot get past the agreement page. The scaling is off to a point where I see the agree and disagree on each side, but it overlays over my info bar at the top and don't do anything when you tap it. Update - South wire reached out and asked me to update the app. I then was able to get past the agreement page. However, I was having trouble getting it to calculate, and they then instructed me to hit the + at the bottom of the screen to add another conductor, and it then calculated.
★★★★★Toby Hollander· Jun 27, 2026
The easiest way to size conduits to NEC code.
★☆☆☆☆Bryce Larter· Dec 30, 2024
Can't even "Agree" to terms and use the app. Formatting and location of button does not work with my phone.
★★☆☆☆R C· Dec 13, 2023
Calculator is accurate, but CIC disclaimer needs to go. It takes up way too much space on the screen. I only get one conductor entry and have to scroll. More often than not, I end up selecting a cell entry rather than scrolling. And I cannot see all conductor data without scrolling. Very frustrating!!! Guess I'll have to look for another app....
★☆☆☆☆Thomas Buis· May 9, 2026
The app did not function. Drop-downs accepted conductor size and qty but fill info not provided
★☆☆☆☆Brian Weaver· Sep 12, 2021
Doesn't offer enough areas to fill for more wire, didn't show arrow to move on to get answer.
★☆☆☆☆B· Jul 11, 2024
Calc did not work on my android for #80 conduit, 12 sols, then 7 conductors
Google Play Rankings for Southwire® Conduit Fill Calc
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Technologies used by Southwire® Conduit Fill Calc
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