Electrical Calc USA 4+

Snappy Appz Inc.

Designed for iPhone

    • 3.5 • 2 Ratings
    • $6.99

iPhone Screenshots


E-Calc is a professional electrical application for calculating many common electrical problems. This app is an essential tool for all electricians and electrical engineers. Unlike other similar apps E-Calc not only calculates simple formulas but returns code results including wire sizing, conduit sizing, fusing, overload size, ground and bond size and much more based on the National Electrical Code. The features of this app are too long to list but here are a few of the key ones;

- Basic construction calculator allows you to easily divide rooms for lighting in imperial or metric measurements.

- Calculate any single motor and get maximum overcurrent, maximum overload, minimum wire, minimum pipe, and minimum bond wire size.

- Calculate any transformer size and get KVA, FLA, pipe size, fuse and breaker size, bond size and ground size, on both primary and secondary. Easily choke down the transformer and get appropriate results for the modified demand load.

- Create any number of panel legends of any size and save as pdf, csv, or print them directly from your device.

- Calculate complex box fill or basic chart based box fill.

- Calculate the allowable ampacity of any wire type and deration situation.

- Calculate maximum number of similar sized wires in a given pipe size.

- Calculate pipe size required for a list of any number, size, and type of wire.

- Calculate required ground and bonding sizes.

- Easily calculate complicated voltage drop calculations. Get results for percentage voltage drop as well as maximum lengths of runs. Derating is also supported.

- Calculate ohm's law, motor fla, drill and tap sizes and voltage unbalance in the 'handy' module.

- Calculate recommeneded torque settings for all varieties of lugs and terminations.

- Convert many common units.

- Find NEMA codes and specs of receptacles.

- Easily access in app support with quick links to your phone's email.

What’s New

Version 4.2.5

- Fixed an issue with overcorrect calculations in the transformer module.

Ratings and Reviews

3.5 out of 5
2 Ratings

2 Ratings

Steve887755 ,


Great app. Very helpful.

GizmoDan ,

Motor calcs don't have HP?

No horsepower on the motor calc screen! Really? What else is missing?

Mark-EE1 ,

Very usefull app

This is a great program. I have used Electrical Calc for both my office and in the field for verifying electricians box fills. Very easy to use. Snappy Apps is fantastic to deal with and very responsive to requests.

App Privacy

The developer, Snappy Appz Inc., has not provided details about its privacy practices and handling of data to Apple. For more information, see the developer’s privacy policy.

No Details Provided

The developer will be required to provide privacy details when they submit their next app update.


  • Family Sharing

    Up to six family members can use this app with Family Sharing enabled.

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