Resistor Color Code Calculator
A resistor color code calculator is a useful tool for reading and decoding resistor color codes. By selecting the appropriate colors for each band, the calculator will display the resistor value, tolerance, and temperature coefficient (if applicable). This can be a convenient way to determine the resistor’s properties without manually consulting a color code chart.
Resistance Value
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Resistors use a system of colored bands to indicate their resistance value, tolerance, and sometimes temperature coefficient. To read them, orient the resistor with the tolerance band (usually gold, silver, or a wider gap) to the right.
Resistor Color Code Chart
| Color | Digit | Multiplier | Tolerance | Temp. Coeff. (PPM/K) |
|---|---|---|---|---|
| Black | 0 | x1 Ω | - | 250 |
| Brown | 1 | x10 Ω | ±1% | 100 |
| Red | 2 | x100 Ω | ±2% | 50 |
| Orange | 3 | x1 kΩ | - | 15 |
| Yellow | 4 | x10 kΩ | - | 25 |
| Green | 5 | x100 kΩ | ±0.5% | 20 |
| Blue | 6 | x1 MΩ | ±0.25% | 10 |
| Violet | 7 | x10 MΩ | ±0.1% | 5 |
| Gray | 8 | x100 MΩ | ±0.05% | 1 |
| White | 9 | - | - | - |
| Gold | - | x0.1 Ω | ±5% | - |
| Silver | - | x0.01 Ω | ±10% | - |