Determine total residential load and size service and feeders using NEC Optional Method.
Identify minimum wire size, wire ampacity, and voltage drop.
Get precise measurements for offsets, saddles, and complex bends.
Stay NEC-compliant and job-ready with fast, reliable residential electrical load calculations.
Generate professional reports for inspectors.
Complete optional method calculations for residential services.
Access an extensive equipment database with common appliances, HVAC systems, and EV chargers.
Take the stress out of wire sizing. Get results that account for ampacity, voltage drop, and environmental conditions.
Calculate ampacity for common conductor types and installation methods.
Analyze voltage drop for DC, single-phase, and three-phase systems.
Get automatic derating for temperature, bundling, and ambient conditions.
Eliminate guesswork and material waste with precise calculations for conduit bends, 90s, and saddles.
Calculate offsets with multipliers for any angle from 10 to 60 degrees.
Navigate obstacles professionally with three- and four-point saddle measurements.
Handle complex three-dimensional routing requirements with rolling offset calculations.
Get everything you need on the job in one integrated app.
Easily convert between amps, volts, watts, kilowatts, horsepower, and KVA.
Calculate voltage, current, power, and resistance with an Ohm’s law solver.
Optimize electrical system efficiency and performance using power factor calculations.
This free calculator app is designed for working electricians, contractors, apprentices, and inspectors who need fast, reliable answers on the job.
Yes. The app includes a conduit fill calculator that follows NEC guidelines and lets you choose from common conductor types. It also calculates derating and provides fill percentage.
Yes. All tools in the Electrical Toolkit app work without internet access. Whether you’re in a basement or out in the field, you’ll still get fast, accurate results.
Yes. You can export detailed load calculations as PDFs. These can be used for documentation, permit applications, or showing your work to clients and inspectors.
Currently, the app just includes residential load calculations.
No, you do not need a Housecall Pro account to use the Electrical Toolkit. The app is available for download from the Apple App Store and Google Play Store.
Visit the Electrical Toolkit by HCP page within the Apple App Store or Google Play Store to download.
The Electrical Toolkit by HCP app is currently available in the United States and Canada.
For questions or help, please contact our support team at: electrical_calculator_support@housecallpro.com
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