Desired Resistance Calculator

Desired Resistance Calculator

by Ekrem Nurdag

0 ratings
1 review
$1.99

Details

  • Released
  • Updated
  • January 20, 2022
  • December 19, 2025
Desired Resistance Calculator screenshot #1 for iPhone
Desired Resistance Calculator screenshot #2 for iPhone
Desired Resistance Calculator screenshot #3 for iPhone
iphone
ipad
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About

This tool helps you find the closest standard resistor value by combining two standard resistors in series or parallel. It supports E12 and E24 resistor series for precise calculations.

Calculates series resistor combinations
Calculates parallel resistor combinations
Supports E12 resistor series
Supports E24 resistor series
Finds closest approximation to desired value
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What's New in Desired Resistance Calculator

1.1

December 19, 2025

Resubmitted to be able to set new age rating questionnaire.

User reviews

Does what it says on the tin

I was embarking on the long-winded process of using a spreadsheet to create series and parallel value tables, but even then they would be tedious to use, having to pick out near matches and work out which is the closest, then I decided to see whether there was an app. And there is – this is it! Invaluable to analogue electronics design: plug in the value you need and the app lists the closest parallel and series resistance pairs and their percentage error. Clearly produced by somebody who's been in that position. Thanks...

But not 5 stars. A couple of improvements I request:

1. Make it work split-screen on iPad.

2. Enable results to be selectively copied-and pasted.
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Response from developer

Thanks for your comment. I will do changes in very near future.

Developer apps

FAQ

What is the Desired Resistance Calculator?

The Desired Resistance Calculator helps you find combinations of two standard resistors (in series or parallel) that will best approximate a specific resistance value you need. It supports E12 and E24 resistor series.

How does the Desired Resistance Calculator work?

You input a desired resistance value, and the calculator determines which two standard resistors from the E12 or E24 series, when connected in series or parallel, will yield the closest possible result.

What resistor series does the Desired Resistance Calculator support?

The calculator supports both the E12 (10% tolerance) and E24 (5% tolerance) series of standard resistors, allowing for different levels of precision in your calculations.

Can I use the Desired Resistance Calculator offline?

As the app is a standalone calculator and does not require an internet connection for its core functionality, it can be used offline.

What devices is the Desired Resistance Calculator available on?

The Desired Resistance Calculator is available on macOS, iPhone, iPad, and iPod Touch, making it accessible across Apple's ecosystem.

How often is the Desired Resistance Calculator updated?

The app was last updated on December 19, 2025, indicating ongoing support and potential for future improvements or bug fixes.

What is the price of the Desired Resistance Calculator?

The Desired Resistance Calculator is a paid application, available for a one-time purchase of $1.99.

Does the Desired Resistance Calculator have ads?

No, the Desired Resistance Calculator does not contain advertisements, providing an uninterrupted user experience.