# Engineering Calc

> Electrical and RF engineering reference tool for component values, Ohm's Law, and Smith Charts. (iPhone/iPad app by Keysight Technologies, Inc..)

- Source: https://appshunter.io/ios/app/engineering-calc/id415598261 (this page in markdown: same URL + `.md`)
- Developer: [Keysight Technologies, Inc.](https://appshunter.io/developer/903911491)
- Category: Reference, Education
- Price: Free
- Rating: 3.40/5 from 10 App Store ratings · 12 written reviews indexed
- Age rating: 4+
- Requires: iOS 5.0 · 3 MB
- Languages: English
- Released: 2011-02-04
- Data updated: 2026-06-10
- Monetization: free
- User reviews in markdown: https://appshunter.io/ios/app/engineering-calc/id415598261/reviews.md

## What is Engineering Calc?

This application is intended for engineers and students who are looking for a reference tool for electrical and RF engineering. Easily determine the resistor and capacitor values based on their color codes, or vice versa. Calculate electrical values based on Ohm's Law. RF engineers can also simulate a Smith Chart diagram.

This application is created as part of a collaboration project between Keysight Technologies and National University of Singapore.

## Key features

- Resistor color code calculator
- Capacitor color code calculator
- Ohm's Law calculations
- Smith Chart simulation
- Reference tool for engineers and students

## Recent user reviews (10 of 12)

All indexed reviews: https://appshunter.io/ios/app/engineering-calc/id415598261/reviews.md

### 1/5 — Why?

*2018-09-19, version 2.0*

This is one of the EE tool which you have given up? Really?

### 3/5 — Dead App?

*2017-04-06, version 2.0*

Is this App still supported?  Apple App Compatibility shows no updates available for this App that won't be able to run on iOS 11.

### 1/5 — Layout issues on iPad Pro

*2016-08-13, version 2.0*

All modes are ok to use except for Ohm's Law button.  It cuts off the results and some entry boxes.  Long in the tooth for updating for newer tech.

This is where Apple needs to pull stuff off until fixed.  Quality is important

### 4/5 — Needs fixed

*2015-12-13, version 2.0*

The resistor calc has an odd banner across the values and it's rendering the tool useless.  Please fix it, thanks!

### 5/5 — Awesome App

*2015-09-02, version 2.0*

Has everything that i need for class!

### 2/5 — Spelling

*2013-08-28, version 1.0*

Check you spelling, converter, not convertor!

### 5/5 — Amazing

*2012-09-20, version 1.0*

Every thing and more it's really useful for my electronics class and for learning the color codes.

### 4/5 — Nice work...

*2011-09-29, version 1.0*

I like that you're giving the app away for free - that's cool.

I wish though the Ohm's Law page would display the actual equation rather than keeping that hidden from you. I think displaying the equation, even if you are going to calculate it for them, helps reinforce the concept.

Full disclosure: I wrote Perfboard, an app with a few overlapping features with this one.

### 4/5 — Add dB to Watt conversion

*2011-09-26, version 1.0*

Great app, add dB to Watt conversion for 5 stars!

### 5/5 — Great app!

*2011-07-09, version 1.0*

This is a very useful app. Has many functions, a great interface and it's from Agilent.

## Frequently asked questions about Engineering Calc

### What is Engineering Calc used for?

Engineering Calc is a reference tool for electrical and RF engineers and students. It helps determine resistor and capacitor values from color codes, calculate electrical values using Ohm's Law, and simulate Smith Charts.

### What devices does Engineering Calc support?

Engineering Calc is available for iPhone, iPad, and iPod devices.

### What is the age rating for Engineering Calc?

Engineering Calc has an age rating of 4+, making it suitable for a wide range of users.

### When was Engineering Calc last updated?

The latest version of Engineering Calc was released on October 25, 2014, with the initial release dating back to February 4, 2011.

### How accurate are the calculations in Engineering Calc?

The application provides calculations based on standard engineering formulas for Ohm's Law and component color codes. Specific accuracy metrics are not provided in the app description.

### Does Engineering Calc have ads?

The provided data does not specify whether Engineering Calc contains advertisements.

### What is the user rating for Engineering Calc?

Engineering Calc has a user rating of 3.4 stars based on 10 ratings.

### Is Engineering Calc free to download?

Yes, Engineering Calc is available for free download.

## Version history (last 2 releases)

### 2.0 — 2014-10-25

-Rebranded to Keysight Technologies
-Updated to support iOS8

### 1.0 — 2011-02-04

No release notes.

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## More apps by Keysight Technologies, Inc.

- [MicroWave Calculator](https://appshunter.io/ios/app/microwave-calculator/id369705771)
- [Tips and Tricks - Keysight Oscilloscopes](https://appshunter.io/ios/app/tips-and-tricks-keysight-oscilloscopes/id416812592)
- [Keysight Pocket Guide](https://appshunter.io/ios/app/keysight-pocket-guide/id579918710)
- [FieldFox](https://appshunter.io/ios/app/fieldfox/id635077328)
- [Electronics Handbook](https://appshunter.io/ios/app/electronics-handbook/id723317441)

All apps by Keysight Technologies, Inc.: https://appshunter.io/developer/903911491

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-06-10.*