Resistor Color Code Calculator
About Resistor Color Code Calculator
This calculator helps you determine the resistance value of a resistor based on its color code. Select the colors for each band to find out the resistor’s value and tolerance.
Color Code Reference
| 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 | – | ±0.05% |
| White | 9 | – | – |
| Gold | – | ×0.1 | ±5% |
| Silver | – | ×0.01 | ±10% |
Examples Calculations
Example 1: Brown-Black-Red-Gold
Calculation:
- Brown (1) = First digit: 1
- Black (0) = Second digit: 0
- Red (×100) = Multiplier: 100
- Gold = ±5% tolerance
Value = 10 × 100 = 1,000Ω = 1kΩ ±5%
Example 2: Yellow-Violet-Orange-Silver
Calculation:
- Yellow (4) = First digit: 4
- Violet (7) = Second digit: 7
- Orange (×1K) = Multiplier: 1,000
- Silver = ±10% tolerance
Value = 47 × 1,000 = 47,000Ω = 47kΩ ±10%
Example 3: Red-Red-Black-Gold
Calculation:
- Red (2) = First digit: 2
- Red (2) = Second digit: 2
- Black (×1) = Multiplier: 1
- Gold = ±5% tolerance
Value = 22 × 1 = 22Ω ±5%