Resistor Color Code Calculator
Decode resistor color bands to find resistance value, or input a resistance to see its color code. Supports 4-band and 5-band resistors.
Select colors for each band:
How to Read Resistor Color Codes
- Band 1: First significant digit.
- Band 2: Second significant digit.
- Band 3 (Multiplier): Number of zeros to add.
- Band 4 (Tolerance): Accuracy of the value.
Color Code Chart
| Color | Digit | Multiplier | Tolerance |
|---|---|---|---|
| Black | 0 | ×1 | — |
| Brown | 1 | ×10 | ±1% |
| Red | 2 | ×100 | ±2% |
| Orange | 3 | ×1K | — |
| Yellow | 4 | ×10K | — |
| Green | 5 | ×100K | ±0.5% |
| Blue | 6 | ×1M | ±0.25% |
| Violet | 7 | ×10M | ±0.1% |
| Gray | 8 | — | — |
| White | 9 | — | — |
| Gold | — | ×0.1 | ±5% |
| Silver | — | ×0.01 | ±10% |
FAQ
How do I know which end to read from?
The tolerance band (gold/silver) is always the last band. Start reading from the opposite end. The first band is usually closer to one end of the resistor body.
Last updated: 2026-08-08