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%
