Easily determine the resistance value of electronic components. Simply select the number of color bands on your resistor and input the colors one by one to instantly get the resistance and tolerance. This tool simplifies a common electronics task.




241+ iOS apps curated and reviewed
Whether you're new to resistor color band calc or looking for an upgrade, our curated collection of 241+ iOS apps has something for everyone. Each app is reviewed and rated by real users, helping you make an informed decision.
| # | App | Price | Rating | Ads | In-App Purchases | Updated | |
|---|---|---|---|---|---|---|---|
| 1 | Free | — | Yes | No | Sep 2026 | ||
| 2 | Free | 4.9★ (60) | No | No | Sep 2026 | ||
| 3 | Free | 5.0★ (5) | Yes | No | Aug 2026 | ||
| 4 | Free | 3.6★ (27) | Yes | No | Jun 2026 | ||
| 5 | Free | 4.0★ (1) | No | No | May 2026 | ||
| 6 | Free | — | No | No | May 2026 | ||
| 7 | Free | 5.0★ (1) | No | Yes | May 2026 | ||
| 8 | Free | — | Yes | No | Aug 2026 |








Easily determine the resistance value of electronic components. Simply select the number of color bands on your resistor and input the colors one by one to instantly get the resistance and tolerance. This tool simplifies a common electronics task.





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.