Electric Master: NEC Panel
Wire Size, Box Fill & Schedule
About
This app provides a suite of electrical calculation tools for professionals, offering NEC-compliant solutions for wire sizing, voltage drop, and more. It works offline and allows for PDF export of results with custom branding.
What's New in Electric Master
2.2.0
August 26, 2026
NEW NAME: this app is now called Electric Master. Same app, same team, same data — it just has a name of its own now. NEW: ONE-LINE DIAGRAM The app now draws a proper single-line diagram straight from the panel you laid out, with ANSI symbols and an orthogonal wire router, and puts it in the PDF next to the panel schedule. ALSO NEW • PANEL SCHEDULE — NEC 408.4 circuit directory, on screen and in the export • CONDUIT BENDING — 9 bend types, bender presets and an on-screen level • More devices on the rail: GFCI, AFCI and dual-function breakers, main lug kits, meter sockets, transfer switches • Faster canvas, cleaner wiring, and a pile of fixes that came straight out of your emails Keep the feedback coming — it is what this release is built from.
MoreSubscription plans
ElectriCalc Pro — Monthly
All 10 calculators, unlimited history, PDF expor.
In-App Purchases
$59.99
ElectriCalc Pro — Lifetime
Unlimited use forever. One-time purchase
Developer apps
FAQ
What electrical codes does ElectriCalc support?
ElectriCalc supports the NEC 2023 and NEC 2026 editions, as well as the CEC 2024 (Canadian Electrical Code). The app can auto-detect the standard by region.
Can I use ElectriCalc without an internet connection?
Yes, ElectriCalc is designed to work 100% offline. You do not need an internet connection, accounts, or tracking to use its calculators on the job site.
How many calculators are included in ElectriCalc?
ElectriCalc offers a total of 20 calculators. Six are available for free, including Voltage Drop, Ampacity, and Ohms Law, with 14 additional Pro calculators available through in-app purchase.
What professional features does ElectriCalc offer?
Professional features include PDF export of branded reports with your logo and contact info, saved calculation history tagged by project, side-by-side comparison mode, Siri Shortcuts for voice commands, and a home screen widget.
Does ElectriCalc have ads?
No, ElectriCalc does not contain advertisements. The app focuses on providing a clean, uninterrupted experience for professionals.
What is the pricing for ElectriCalc Pro?
ElectriCalc Pro is available via a monthly subscription priced at $9.99 per month. This unlocks the 14 Pro calculators and advanced features.
What devices is ElectriCalc compatible with?
ElectriCalc is compatible with iPhones and iPads. It is rated for ages 4 and up.
How often is ElectriCalc updated?
The latest version of ElectriCalc is 1.4.0, last updated on May 4, 2026. Updates typically include new code editions and feature enhancements.