Simple software for electricians.
Replace load calculations, code lookups, and clunky diagramming software with purpose-built software, you'll actually use.
Save time, work less.
Some sparkies use it.
Tools should work, you should work less
If you install EV chargers, heat pumps, solar - or find yourself staring at an electrical panel at least once a week, we can help.
Run load calculations, without math
Enter all property details on your phone, and run residential and commercial compliant calculations.
Learn more about the Load CalculatorBuild line diagrams, like it's 2026
Drag, drop, and export drawings with a simple interface. No more wrestling with outdated software.
Learn more about the Line Diagram toolField-Ready
Designed for job sites, not just desks. Use it standing in a panel room.
NEC-Compliant
Calculations and code lookups are grounded in actual NEC text. Not guesswork.
Any Device
Runs in the browser on phones, tablets, and laptops. Nothing to download.
Fast and Simple
No training needed. If you can fill out a form, you can use Breakerbox.
Code Lookup
Get trusted electrical code answers through a simple chatbot. Ask questions in plain English, get responses backed by actual code.
Learn more about Code Lookup143 companies and counting
Customers talked about us
"An EV calc isn't hard math, but there are a lot of moving parts. Heat pump, solar export, panel headroom, the charger itself. Breakerbox keeps them straight so I don't have to."
"We were drawing the same diagram three times. Once for the bid, once for the permit, once for the as-built. Now it's one drawing that gets edited."
"When everyone does the calc the same way, you stop arguing about whose number is right. The number is right because the tool is right."
"I used to sit at the kitchen table with a receipt sized list and a calculator, hoping I didn't add a circuit twice. Now it's the quick part a panel swap."
"Used to be I'd sit in the truck flipping pages. Now I ask Breakerbox, get the article reference, get back to the panel. End of story."
Breakerbox Lives Where You Work
Phone in the truck, laptop in the office, tablet on the jobsite. Open Breakerbox on whatever junk phone you have and pick up exactly where you left off.
Replaces Spreadsheets, PDFs, and Pen-and-Paper
No more juggling Excel templates, scrolling through 1,000-page code PDFs, or sketching diagrams on the back of a receipt. One simple set of tools that does the things electricians do every week.
It takes 5 mins to start
No demo calls. No onboarding or training. Sign up, log in, and start working. But we are here if you need us.
Check pricingSelf-serve signup
Create your account and start using Breakerbox right away. No sales call required.
14-day free trial
Full access to every tool for 14 days. No credit card up front. Cancel anytime.
Works on any device
Phone, tablet, or laptop. Breakerbox runs in your browser -- use it wherever you work.
Simple software for electricians. Three tools in one place: a load calculator, a plain-English NEC code lookup, and a line diagram builder. Built around how you already think about the job, not how software wants to model it.
Residential and light-commercial electricians. Solo shops, service techs, and small crews. If any part of your week goes to load calcs, code lookups, or line diagrams, this is for you. Not for plumbers. Not for HVAC. Not for big-box GCs.
Most users run their first calc in under 5 minutes. No install. No training. No sales call. Sign up, log in, start working.
Yes. 14 days, no credit card required, full access to every tool. If it doesn't save you time, you haven't lost anything.
Simple monthly pricing. All three tools included. No per-user fees, no add-ons. Start with the free 14-day trial, then pick the plan that fits your shop. See current pricing →
No. Runs in the browser on any device. Phone in the truck, tablet on the jobsite, laptop at the desk. Open it, sign in, pick up where you left off.