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.
1.4
July 4, 2026
Minor improvements and bug fixes. Happy calculating!
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No, Conduit Fill is ad-free. The app focuses on providing a clean and uninterrupted experience for professionals.
Conduit Fill supports multiple NEC code years, including 2017, 2020, 2023, and 2026. You can switch between them with a single tap.
Yes, Conduit Fill is built for offline use. All NEC tables are stored on the device, allowing you to perform calculations in areas with no internet connection.
Conduit Fill offers a 7-day free trial for its yearly subscription at $19.99. Alternatively, you can purchase Lifetime access for $29.99 or a monthly subscription for $4.99.
You can group calculations under specific jobs, attach photos of panels and splices, and export entire project bundles. This helps keep your work organized and ready for review.
Conduit Fill prioritizes user privacy by collecting no data. There are no accounts, sign-ins, tracking, or analytics; your projects and calculations remain solely on your device.
Yes, Conduit Fill features a Field Mode with glove-friendly buttons, haptic confirmations, and larger tap targets, making it practical for use on job sites.
The app was last updated on July 4, 2026, indicating active development and support. Users can expect ongoing improvements and NEC code updates.
