Resistor Color Code Calculator (4, 5, 6 Band)
Decode IEC 60062 resistor color bands into resistance values or generate color codes from values. Includes support for 4, 5, and 6-band resistors and E-series standard validation.
About
In electronics manufacturing and repair, identifying resistance values quickly is critical for circuit integrity. This tool translates the IEC 60062 color coding standard used on axial-lead resistors into numerical resistance values (Ω), and vice versa.
It supports 4-band (2 significant digits), 5-band (3 significant digits), and 6-band (includes Temperature Coefficient) configurations. Additionally, the tool cross-references calculated values against the E-Series (E6, E12, E24, E96) preferred numbers to verify if the resistor is a standard mass-produced component or a theoretical custom value.
Formulas
The resistance value (R) is calculated by concatenating significant digits (d) and applying a multiplier (m).
Reference Data
| Color | Digit | Multiplier | Tolerance | Temp Coeff. |
|---|---|---|---|---|
| Black | 0 | 1 Ω | — | 250 ppm/K |
| Brown | 1 | 10 Ω | ±1% | 100 ppm/K |
| Red | 2 | 100 Ω | ±2% | 50 ppm/K |
| Orange | 3 | 1 kΩ | — | 15 ppm/K |
| Yellow | 4 | 10 kΩ | — | 25 ppm/K |
| Green | 5 | 100 kΩ | ±0.5% | — |
| Blue | 6 | 1 MΩ | ±0.25% | 10 ppm/K |
| Violet | 7 | 10 MΩ | ±0.1% | 5 ppm/K |
| Gray | 8 | — | ±0.05% | 1 ppm/K |
| White | 9 | — | — | — |
| Gold | — | 0.1 Ω | ±5% | — |
| Silver | — | 0.01 Ω | ±10% | — |