Resistor Color Code Calculator
Resistor Color Code Calculator
This interactive tool helps users determine the resistance value, tolerance, and temperature coefficient of resistors based on their color bands. It's an essential utility for electronics hobbyists, engineers, and students working with electronic circuits.
Key Features:
- Supports 4-band, 5-band, and 6-band resistor calculations
- Calculates resistance in ohms (Ω), kilohms (kΩ), and megohms (MΩ)
- Determines tolerance percentage (±%)
- For 6-band resistors, calculates temperature coefficient (ppm/°C)
- Visual color band representation
How to Use:
- Select the number of color bands (4, 5, or 6)
- Choose colors for each band from dropdown menus
- The calculator will automatically display the resistance value and specifications
Example Calculations:
| Band Colors | Value | Tolerance |
|---|---|---|
| Brown-Black-Red-Gold | 1kΩ ±5% | 5% |
| Yellow-Violet-Black-Silver | 47Ω ±10% | 10% |
| Red-Red-Black-Black-Brown | 220Ω ±1% | 1% |
Color Code Reference:
| Color | Digit | Multiplier | Tolerance |
|---|---|---|---|
| Black | 0 | 1Ω | - |
| Brown | 1 | 10Ω | ±1% |
| Red | 2 | 100Ω | ±2% |
| Orange | 3 | 1kΩ | ±3% |
| Yellow | 4 | 10kΩ | ±4% |
| Green | 5 | 100kΩ | ±0.5% |
| Blue | 6 | 1MΩ | ±0.25% |
| Violet | 7 | 10MΩ | ±0.1% |
| Gray | 8 | 100MΩ | ±0.05% |
| White | 9 | 1GΩ | - |
| Gold | - | 0.1Ω | ±5% |
| Silver | - | 0.01Ω | ±10% |
Practical Applications:
- Identifying unknown resistors in circuit repair
- Verifying resistor values before installation
- Learning electronics and resistor coding systems
- Designing circuits with specific resistance requirements
Note: For military-spec resistors with additional bands, consult specialized references as they may follow different coding standards.