Resistor Calculator
Work out a resistor's value from its color bands, or find the bands for a value you need. Supports 4, 5 and 6-band resistors.
Pick the band colors below
Band 1
Band 2
Band 3
Multiplier
Tolerance
Temp. co.
Accepts k for kilo-ohms and M for mega-ohms — e.g. 4.7k = 4,700 Ω.
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Full color code reference table
| Color | Digit | Multiplier |
|---|---|---|
| Black | 0 | ×1 |
| Brown | 1 | ×10 |
| Red | 2 | ×100 |
| Orange | 3 | ×1,000 |
| Yellow | 4 | ×10,000 |
| Green | 5 | ×100,000 |
| Blue | 6 | ×1,000,000 |
| Violet | 7 | ×10,000,000 |
| Grey | 8 | — |
| White | 9 | — |
| Gold | — | ×0.1 |
| Silver | — | ×0.01 |
| Color | Tolerance |
|---|---|
| Brown | ±1% |
| Red | ±2% |
| Green | ±0.5% |
| Blue | ±0.25% |
| Violet | ±0.1% |
| Grey | ±0.05% |
| Gold | ±5% |
| Silver | ±10% |
| Color | Coefficient |
|---|---|
| Brown | 100ppm/°C |
| Red | 50ppm/°C |
| Orange | 25ppm/°C |
| Yellow | 15ppm/°C |
| Blue | 10ppm/°C |
| Violet | 5ppm/°C |