Instantly decode resistor color bands to find resistance, tolerance, and TCR. Also calculates series/parallel resistance and voltage dividers. Supports E-series validation and multiple languages.






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Resistor color codes calc is the household name in resistor color codes calc, but it's far from the only option. We track 241+ alternatives and competitors on iOS — many free, many higher-rated than you'd expect.
| # | App | Price | Rating | Ads | In-App Purchases | Updated | |
|---|---|---|---|---|---|---|---|
| 1 | Free | — | Yes | No | Aug 2026 | ||
| 2 | Free | 5.0★ (5) | Yes | No | Sep 2026 | ||
| 3 | Free | 4.9★ (60) | No | No | Sep 2026 | ||
| 4 | Free | 5.0★ (1) | No | Yes | Sep 2026 | ||
| 5 | $2.99 was $6.99 | — | No | No | May 2026 | ||
| 6 | Free | — | Yes | No | Sep 2026 | ||
| 7 | $4.99 | — | No | No | Jun 2026 | ||
| 8 | Free | 4.0★ (1) | No | No | May 2026 |






Instantly decode resistor color bands to find resistance, tolerance, and TCR. Also calculates series/parallel resistance and voltage dividers. Supports E-series validation and multiple languages.





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 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.