This utility helps you determine the resistance value of resistors by interpreting their colored bands. It supports 3, 4, 5, and 6 band resistors, visually displaying your selections and the calculated resistance and tolerance.





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If you already know Resistor color code calc, this is the deeper bench. 208+ resistor color codes apps for iPhone, all reviewed and ranked by user rating, recency, and download trend as of June 2026.
| # | App | Price | Rating | Ads | In-App Purchases | Updated | |
|---|---|---|---|---|---|---|---|
| 1 | Free | 5.0★ (5) | Yes | No | Aug 2026 | ||
| 2 | Free | 5.0★ (2) | No | No | May 2026 | ||
| 3 | Free | 4.0★ (1) | No | No | May 2026 | ||
| 4 | Free | — | Yes | No | Aug 2026 | ||
| 5 | Free | 3.6★ (27) | Yes | No | Jun 2026 | ||
| 6 | Free | — | Yes | No | Aug 2026 | ||
| 7 | Free | 4.9★ (60) | No | No | Sep 2026 | ||
| 8 | Free | 4.7★ (1.4K) | No | Yes | Aug 2026 |





This utility helps you determine the resistance value of resistors by interpreting their colored bands. It supports 3, 4, 5, and 6 band resistors, visually displaying your selections and the calculated resistance and tolerance.


Easily determine resistor values without a multimeter. Simply spin the color wheels to match your resistor. This tool simplifies the process of identifying resistance.

Quickly identify the value of resistors using their color bands. This utility tool simplifies electronics calculations for hobbyists and professionals alike.