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Don’t take our word for it. See what contractors are saying about using Kopperfield for their business.

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See why contractors
choose Kopperfield

Don’t take our word for it. See what contractors are saying about using Kopperfield for their business.

Trusted by contractors nationwide

“Since we’ve gotten set up on their platform, we’ve booked over 100 jobs in just 10 weeks, with limited site visits.”

Derek, electrical shop owner

“The Kopperfield tool helps with load calculations and avoids common mistakes [...]. I refer Kopperfield’s tool to contractors I work with.”

Reina, city electrical inspector

“Used your load calc tool for an ADU project where the city required load calcs and meter sizing. Your tool was helpful in determining the amperage requirements.”

Adam, draftsperson

“I was under the gun to get a load calculation for a generator project and found your website. Load calcs are a pain but your tool was very helpful.”

Daniel, electrical contractor

“I have nothing but praises for Kopperfield, it has helped me 5x my business in a matter of months.”

Gabe, electrical shop owner

“I really love the freaking load calculator.”

Perry, electrical contractor

“I do a lot of EV charger installs, and getting permits can be a hassle. Your tool sped up the process. I liked how simple it was to use, and I’ve already used it a couple of times.”

Jorge, electrical shop owner

“I could quickly select the correct kilowatt rating and have everything pop up in the tool. It made calculating load fast and give a nice looking page to send to a customer.”

Jessica, shop owner

“I was looking at [a customer’s] information, and he called me immediately after. It made the conversation go much smoother.”

Micah, electrical shop owner

“It was super fast and easy— took me about 10 to 15 minutes to get everything ready for the proposal. Really quick, it was great.”

Justin, electrical shop owner

“As soon as I used the load calc tool I could see why you called it Kopperfield, because it’s like magic!”

Tim, electrical shop owner

“The power company now requires load calcs for everything. I used to do them by hand, but after finding your site, I gave it a try. It’s definitely easier and saves time.”

Joe, electrical contractor

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Free load calculator
Calculate electrical loads with NEC defaults and downloadable PDFs
Free single line diagrams
Generate single line diagrams from a library of common templates
Free NEC chatbot
Get help interpreting the National Electrical Code

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