Five electrical field calculators that show their work, plus conduit bending and Journeyman & Master exam preparation.
Free field calculators. Paid bending and study apps from $14.99. One-time purchases, no subscription.
Mixed conductors, equipment limits, parallel runs and load checks. All five are free to use in your browser. Each tool explains its method so you can review the result against the installation.
Compare raceways from ½ through 4 inches. Include insulated grounds and custom round-conductor diameters, then use the smallest fitting size.
Check conduit fill →Add mixed wire sizes, grounding conductors, device yokes, clamps and fittings. See required volume, remaining space and the counting breakdown.
Check box volume →Apply ambient and CCC factors, check terminal limits and continuous loads, and calculate equal parallel sets in separate raceways.
Check allowable ampacity →Check copper or aluminum on single- or three-phase circuits. Set a drop target and compare conductor size or maximum run length.
Check voltage drop →Enter two values and see the worked solution. Convert between current, kW and kVA, or calculate power factor for AC loads.
Solve electrical formulas →Move the CCC count from Conduit Fill into Ampacity, then carry conductor size and current per parallel set into Voltage Drop.
Open the full calculator suite →Conduit Bending Pro and the License Exam Study App are available together for $34.99, paid once.
NEC reference methods for qualified electrical workers. Verify the adopted edition, local amendments, equipment listings and installation conditions. Field calculators require an internet connection to load; bending and study support offline use after installation.
Choose one app or get both in the bundle. Current prices are in US dollars and are one-time purchases.
Listen up, future spark wranglers! If you're an electrician—or dreaming to be one—you're about to hit a critical hurdle: the licensing exam. But don't sweat it; I'm here to guide you through the maze.
I've been knee-deep in this trade for over 60 years as a Professional Electrical Engineer, Master Electrician, and Electrical and General Building Contractor. I've built and inspected installations across the U.S., Canada, Ireland, the UK, and even the Philippines. Taught the National Electrical Code for the Associated Builders and Contractors, too. I'm not just a name; I've held my ground with NECA, BICSI, SAME, and countless other organizations. Whether it was rolling with IBEW or hustling as a non-union contractor, I know this industry inside and out. And you better believe I know what it takes to ace these exams—I've taken more than a few myself.
Let me tell you something crucial that flipped the script for me while living in Salt Lake City. I stumbled upon a testing company that administered licensing exams for most states. Instead of hopping from one state capital to another like some kind of license-hunting nomad, I decided to play it smart: I scheduled all my tests at their facility—at one point, I was cranking out two or three state tests in one sitting!
Here's the kicker: this testing company was pulling from the same question bank for every state. Once I caught wind of that, everything fell into place. Study the code until it's second nature, and forget about geographical limitations.
But let's be crystal clear—the National Electrical Code (NEC) is your Holy Grail. You need to know it inside and out—the specifics, not just the generalities. This is where preparation makes all the difference between success and floundering.
We've crafted an exam prep app that pulls from my decades of experience. It's designed for both Journeyman and Master Electrician content, all based on the 2026 NEC—ideal whether you're prepping for your first exam or brushing up for continuing education.
Right now, this powerhouse app houses over 220 multiple-choice questions. Miss one? Don’t worry—it redirects you to the right answer with an explanation that’ll make it stick. We’re expanding it to include calculation-based questions too: load calculations, conductor sizing, conduit fill—the skills you’ll need to work through on paper anyway.
We’ll keep updating it as the code evolves, because staying ahead is what separates the pros from the amateurs.
Ever stared at those beautiful concentric bends and wondered how on earth they got laid out so perfectly? Most of us learned offsets from some flimsy laminated card and guessed our way through the rest. But there’s a smarter way.
Our conduit bending calculator gives you precise mark distances, stagger amounts, and bite spacings for creating perfect offsets, concentric bends, and saddles across every major conduit type—in both metric and imperial. It runs right on your phone and works offline at job sites. Say goodbye to guesswork; we’ve crunched the numbers for you.
Here’s the deal: nothing substantial. We priced these tools so that every hardworking electrician can access them—because you’re the ones who need them most. Download both apps, use them to prep for your exam, then keep them handy for your daily grind.
After sixty years in this game, I can tell you: success in electrical work comes from continuous learning. These tools are engineered to help you do just that—learn, grow, and conquer.