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Easier residential docs, 

from panel to permit

Easier residential docs, 

from panel to permit

Simplify permits and inspections with faster design tools for residential projects. Perfect for panel changes, remodels, and electrical service work.

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Easier residential docs, from panel to permit

Simplify permits and inspections with faster design tools for residential projects. Perfect for panel changes, remodels, and electrical service work.

Permit-ready calcs and docs for every residential project

Aligned to the code

Create residential load calcs with math based on NEC Article 220. Use the optional or the standard method and easily compare between the two.

Designed for dwellings

Create custom docs for dwellings. Select nominal voltages to match your specific project requirements with ease.

Branded for your shop

Personalize designs with your logo and license. Create professional docs that build trust with inspectors and clients and help win more work.

Handles all standard residential scenarios

Easily configure load calcs and panel schedules for any common nominal voltage or residential dwellings scenario.

120/208 V power
120/240 V power
120/240V
480Y/277V 3Ø
480V 3Ø Delta
120/208V
600Y/347V 3Ø
600V 3Ø Delta
208Y/120V 3Ø 
240V 3Ø Delta
240V 3Ø Hi-leg Delta
347V 3Ø Delta
Generator sizing
Single family homes
Multi dwelling units
Accessory dwelling units

Standard or optional method load calcs

Quickly calculate residential loads using either the standard or optional method. Toggle between methods to see which is best for your project.

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Generator sizing for residential projects

Estimate generator size in seconds. Adjust reserve margin and voltage dip to make it easy to specify the right generator size for any home. 

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Ready-to-use residential line diagram templates

Save time with residential templates. Select from common scenarios like panel upgrades, EV chargers, solar, generators, and battery installs for faster approvals.

Simplified residential panel schedules

Build panel schedules easier than in a spreadsheet. Add triple and quad breakers and create circuit labels you can share with a customer. Use AI to get started with just a panel photo.

Residential electricians choose Kopperfield

“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, Business owner

Less paperwork, 
more progress.

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Get started with our popular free tools

Free load calculator
Calculate electrical loads with NEC defaults and downloadable PDFs
Free single line diagram
Generate single line diagrams
from a library of common templates
Free panel schedules
Drag and drop breakers and edit labels
to create custom schedules
Commercial tools common questions

Is there a free trial available?

What nominal voltage options are available in the residential tools?

Who is this tool made for?

Who can I reach out to if I have questions?