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Mike Holt's Electrical Toolbox

Mike Holt's Electrical Toolbox

Electrical Power Calculator

197 ratings
30 reviews
📚 Education
🔧 Utilities
Free

Details

  • Released
  • Updated
  • May 23, 2019
  • June 26, 2026

Features

Developer

Mike Holt Enterprises Inc.
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About

This app provides essential calculations for electricians, inspectors, contractors, and engineers. It helps determine conductor sizing, circuit protection, race sizing, and grounding conductor sizes for various electrical equipment and services.

✓Conductor sizing
✓Voltage drop limitations
✓Circuit protection sizing
✓Race sizing
✓Equipment grounding conductor sizing
✓Dwelling-unit service calculations
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What's New in Mike Holt's Electrical Toolbox

2.0.02

June 26, 2026

Bug fixes and performance improvements.

User reviews

Most RecentHighest RatedLowest Rated

You can’t email the information you have to forward

It’s a good app, but it has the option to email the results, but it won’t let you. It’s frustrating.
UsernonUsernon

Need more

Take transformers at least to 225kva. 112 isn’t enough for this to be useful.
Spark1239Spark1239

Great app

Perfect app. I really like how it gives the code article with the results.
bouf328bouf328

Great in the tool box

Outstanding app to verify calculations. The best parts is it gives reference to code sections so you ca read for your self.
It totally awefullIt totally awefull

Outdated

Info in this app is outdated and for the most part useless to any decent electrician
cbenn81cbenn81
See 25 more reviews

FAQ

What kind of calculations does this app perform?

This app performs a variety of essential electrical calculations. These include conductor sizing, accounting for voltage drop limitations, circuit protection sizing, race sizing, and equipment grounding conductor sizing for various types of equipment like heating, air-conditioning, motors, and transformers. It also handles dwelling-unit service calculations.

Who is this app designed for?

The app is specifically designed for professionals in the electrical industry. This includes electricians, inspectors, instructors, contractors, and engineers who need practical and useful tools for their daily work.

Is this app free to use?

Yes, based on the provided information, this app is available for free. There are no indications of in-app purchases or advertisements, suggesting a completely free user experience.

What types of electrical equipment can be calculated?

The app supports calculations for a wide range of electrical equipment. This includes electric heating equipment (commercial and residential), air-conditioning equipment (commercial and residential), motors (commercial and residential), and transformers (commercial). It also covers dwelling-unit service calculations.