# Resistor Color Calculator

> Calculates resistor values and Ohm's Law for electronics. (iPhone/iPad app by michael lawson.)

- Source: https://appshunter.io/ios/app/resistor-color-calculator/id923982865 (this page in markdown: same URL + `.md`)
- Developer: [michael lawson](https://appshunter.io/developer/923982864)
- Category: Utilities, Education
- Price: Free
- Age rating: 4+
- Requires: iOS 8.0 · 2 MB
- Languages: American English
- Released: 2014-11-03
- Data updated: 2026-06-10
- Monetization: free
- User reviews in markdown: https://appshunter.io/ios/app/resistor-color-calculator/id923982865/reviews.md

## What is Resistor Color Calculator?

This app allows you to calculate the value and the tolerance of a standard 4 band resistor, along with a visualisation to check that the color code you have entered is correct.

Also included is an Ohm's law calculator, to allow you to calculate the missing value, given two values of voltage, current or resistance.

## Key features

- 4-band resistor value calculation
- Tolerance calculation
- Color code visualization
- Ohm's Law calculator
- Voltage, current, resistance calculation

## Recent user reviews (1 of 1)

All indexed reviews: https://appshunter.io/ios/app/resistor-color-calculator/id923982865/reviews.md

### 5/5 — Useful

*2014-11-18*

Useful app and simple to use

## Frequently asked questions about Resistor Color Calculator

### What is the Resistor Color Calculator app?

The Resistor Color Calculator app helps you determine the value and tolerance of standard 4-band resistors. It also includes a handy Ohm's Law calculator for electrical calculations.

### Does the Resistor Color Calculator app have ads?

No, the Resistor Color Calculator app is completely free and does not contain any advertisements.

### What devices is the Resistor Color Calculator app compatible with?

The Resistor Color Calculator app is available for iPhone and iPod devices.

### How often is the Resistor Color Calculator app updated?

The Resistor Color Calculator app was last updated on December 20, 2016, with version 1.1.

### What is the age rating for the Resistor Color Calculator app?

The Resistor Color Calculator app has an age rating of 4+, making it suitable for a wide range of users.

### Can I calculate resistor values other than 4-band with this app?

The current version of the Resistor Color Calculator app is designed specifically for standard 4-band resistors.

### Is the Resistor Color Calculator app free to download?

Yes, the Resistor Color Calculator app is available for free download on supported devices.

## Version history (last 2 releases)

### 1.1 — 2016-12-20

This app has been updated by Apple to display the Apple Watch app icon.

-Updated layout

### 1.0 — 2014-11-01

No release notes.

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## More apps by michael lawson

- [Hakka free phrasebook](https://appshunter.io/ios/app/hakka-free-phrasebook/id944820351)

All apps by michael lawson: https://appshunter.io/developer/923982864

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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.*