Resistor Color Code Calculator
Decode 4, 5, and 6-band resistor color codes to resistance and tolerance.
Resistance
Tolerance
Range
Temp. Coefficient
How to Read Resistor Bands
Resistors use colored bands to encode their resistance value, tolerance and (for precision parts) temperature coefficient. The first bands are significant digits, followed by a multiplier band, a tolerance band and optionally a temperature coefficient band.
- 4-band: digit, digit, multiplier, tolerance
- 5-band: digit, digit, digit, multiplier, tolerance
- 6-band: digit, digit, digit, multiplier, tolerance, temperature coefficient
Color Code Table
| Color | Digit | Multiplier | Tolerance | Temp. Coeff. |
|---|---|---|---|---|
| Black | 0 | ×1 | — | — |
| Brown | 1 | ×10 | ±1% | 100 |
| Red | 2 | ×100 | ±2% | 50 |
| Orange | 3 | ×1k | — | 15 |
| Yellow | 4 | ×10k | — | 25 |
| Green | 5 | ×100k | ±0.5% | — |
| Blue | 6 | ×1M | ±0.25% | 10 |
| Violet | 7 | ×10M | ±0.1% | 5 |
| Grey | 8 | ×100M | ±0.05% | — |
| White | 9 | ×1G | — | — |
| Gold | — | ×0.1 | ±5% | — |
| Silver | — | ×0.01 | ±10% | — |
Reading Direction Tips
- Hold the resistor with the tolerance band (often gold or silver) on the right.
- Read from left to right, starting with the significant digit bands.
- The tolerance band usually has a wider gap separating it from the value bands.
- When in doubt, measure the resistor with a multimeter to confirm.
Related Calculators
Note: This calculator follows standard EIA resistor color code conventions. Always verify critical values with a multimeter, as manufacturing variations and non-standard markings may occur.