Conduit Filler5.3 - App Store

The Conduit Filler is designed to help electrical tradespeople with their conduit fill calculations and with conduit sizing for various gage of wires. Select the conduit type, conduit size and wire type you are using to find out the maximum number of allowable conductors. For conduit sizing simply select the conduit type, wire type and add the amount of wires for each gage.
New for 2026, we added a section for electricians in the United Kingdom with Conduit and Trunking calculations.
All calculations are done in accordance with the 2026 USA National Electrical Code, the 2024 Canadian Electrical Code and the British Standard BS 7671,

To get to know our app we are providing you with a 7 day fully functional trial period for your convenience. After that you have the option to subscribe to this app on a monthly or yearly basis.

During the subscription period this app will unlock and function without any restrictions.
Subscription can be enabled on more devices with the same Apple ID.
Your subscription will be charged to your App Store account at confirmation of purchase, and will automatically renew (at the duration selected) unless auto-renew is turned off at least 24 hours before the end of the current period.
Current subscription may not be cancelled during the active subscription period, however, you can manage your subscription and/or turn off auto-renewal by opening the Settings App, tapping your name and tapping Subscription.
No 3rd party advertisement presented.

About our Terms of Use and our Privacy Policy, you will find detailed information within our App or you can also visit our home page at:
http://archalog.com

Version History Update to the latest IOS and bug fixes. 5.3 Jul 24 Updated to the latest 2026 NEC. Bug fixes. 5.2 Jan 16 Update to IOS 26. Bug fixes. 5.1 10/01/2025 Haptic feedback added to buttons. Bug fixes. 5.0 01/19/2025 Bug fixes related to the Conduit Sizing section. 4.9 12/07/2024 Bug fixes related to sound presentation. User interface improvements. Corrected incorrect selection display after the memory data was used. 4.8 10/12/2024 User interface improvements. Corrected incorrect selection display after the memory data was used. 4.7 10/11/2024 Updates for the 2024 Canada CEC. New section for the British Standard BS 7671.
Data savings to memory at all sections. User interface improvements. 4.6 08/29/2024 Updates for the 2023 USA NEC. Additional conductors added to both NEC and CEC. User interface updated. Memory savings added to Conduit Fill sections. New 'Help' page added. Bug fixes. 4.5 01/16/2024 Updates for the 2023 USA NEC. Additional conductors added to both NEC and CEC. User interface updated. All 3rd party advertisements removed. Lifetime buy option discontinued and subscription introduced. Bug fixes. 4.4 09/14/2023 Updates for the 2023 USA NEC. Additional conductors added to both NEC and CEC. User interface updated. All 3rd party advertisements removed. Lifetime buy option discontinued and subscription introduced. Bug fixes. 4.3 09/04/2023 Updates for the 2023 USA NEC. Additional conductors added to both NEC and CEC. User interface updated. All 3rd party advertisements removed. Lifetime buy option discontinued and subscription introduced. 4.2 09/01/2023 Fixed display issues for 'Dark' mode. Updates for iOS 14.5 and for the current 2020 NEC and for the 2021 CEC. 3.0 06/09/2021 Improved result display and update to iOS 13. 2.2 01/07/2020 Minor improvements and bug fixes. 2.1 09/10/2019 Available with specific USA and Canada data. Calculations based on the country's national electrical code. We also improved user interface with customizable data display. Now, you can also save your conduit sizing selection for later retrieval. 2.0 06/24/2019 1.0 02/03/2019