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Commercial load calculations that save time

Get started ->Try residential free

Drop the clunky worksheets and move faster from bid to build. Complete commercial load calculations with confidence and get code-compliant reports for every occupancy type.

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Commercial load
calculations that save time

Drop the clunky worksheets and move faster from bid to build. Complete commercial load calculations with confidence and get inspector-ready reports for all occupancy types.

Get Started ->Try residential free

Commercial load calculation with Kopperfield load calculator overlays

Create commercial load calculations with confidence

Fast

Kopperfield saves you time with with an easy-to-use interface and automatic calculation logic

Compliance focused

Built around NEC Article 220 to help you prepare inspection-ready load calcs

Mobile friendly

Kopperfield’s mobile app makes it easy to create, edit, and share calculations from the field

Fast and easy data entry

Easily calculate load VA from amperage or breaker size. Speed up data entry with our equipment library.

Get started ->Try residential free

Kopperfield load calculation HVAC section with options to add equipment items

Kopperfield load calculation with occupancy type dropdown

Automatic demand factors

Get accurate results with automatic application of demand factors based on commercial occupancy type.

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Professional PDF generation

Win faster approvals and impress clients with instant, professional PDF reports of your commercial load calcs.

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Kopperfield load calculation PDF with mobile app

Kopperfield load calculator with NEC visual warning

NEC compliance assistance

Get a visual warning if your selected equipment has an NEC minimum and the entered VA value is too low.

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Get started with the mobile app

Download our app to create load calculations on the go using your iOS or Android phone or tablet

Trusted by 1000s of electricians and contractors

The Kopperfield tool helps with load calculations and avoids common mistakes, such as handling an EV charger in a load calc. I refer Kopperfield’s tool to contractors I work with.

Reina M, City Electrical Inspector