How to Read Electronic Resistor Color Codes
Resistors use standardized color-coded bands defined in standard IEC 60062 to identify their electrical resistance in Ohms ($\Omega$), manufacturing tolerance percentage, and temperature reliability coefficient.
Standard Resistor Color Code Chart
| Color | Digit | Multiplier ($10^x$) | Tolerance (%) | Temp Coeff (PPM/K) |
|---|---|---|---|---|
| Black | 0 | $10^0 = 1$ | - | 250 |
| Brown | 1 | $10^1 = 10$ | ±1% | 100 |
| Red | 2 | $10^2 = 100$ | ±2% | 50 |
| Orange | 3 | $10^3 = 1\text{k}$ | - | 15 |
| Yellow | 4 | $10^4 = 10\text{k}$ | - | 25 |
| Green | 5 | $10^5 = 100\text{k}$ | ±0.5% | 20 |
| Blue | 6 | $10^6 = 1\text{M}$ | ±0.25% | 10 |
| Violet | 7 | $10^7 = 10\text{M}$ | ±0.1% | 5 |
| Gray | 8 | $10^8 = 100\text{M}$ | ±0.05% | 1 |
| White | 9 | $10^9 = 1\text{G}$ | - | - |
| Gold | - | $0.1$ | ±5% | - |
| Silver | - | $0.01$ | ±10% | - |