Resistor Color Code Calculator
Calculate resistance values by selecting color bands. Perfect for electronics projects, circuit design, and electronics education.
Resistor Color Code Chart:
| Color | 1st Digit | 2nd Digit | 3rd Digit | Multiplier | Tolerance | Temp. Coef. |
|---|---|---|---|---|---|---|
| Black | 0 | 0 | 0 | ×1 | - | - |
| Brown | 1 | 1 | 1 | ×10 | ±1% | 100 ppm/°C |
| Red | 2 | 2 | 2 | ×100 | ±2% | 50 ppm/°C |
| Orange | 3 | 3 | 3 | ×1,000 | - | 15 ppm/°C |
| Yellow | 4 | 4 | 4 | ×10,000 | - | 25 ppm/°C |
| Green | 5 | 5 | 5 | ×100,000 | ±0.5% | - |
| Blue | 6 | 6 | 6 | ×1,000,000 | ±0.25% | 10 ppm/°C |
| Violet | 7 | 7 | 7 | ×10,000,000 | ±0.1% | 5 ppm/°C |
| Gray | 8 | 8 | 8 | - | ±0.05% | - |
| White | 9 | 9 | 9 | - | - | - |
| Gold | - | - | - | ×0.1 | ±5% | - |
| Silver | - | - | - | ×0.01 | ±10% | - |
| None | - | - | - | - | ±20% | - |
About Our Resistor Color Code Calculator
Our Resistor Color Code Calculator is a precise and user-friendly tool designed to help you determine the resistance value from color bands. Whether you're working on electronic circuits, prototyping, or checking components, our calculator provides accurate and comprehensive results.
What are Resistor Color Codes?
Resistor color codes are a standardized method for indicating the resistance value on small resistors. Most resistors have 4, 5, or 6 colored bands that represent different aspects of the resistor's value and specifications. The first bands indicate the significant digits, followed by a multiplier, tolerance, and sometimes a temperature coefficient band.
Key Features:
- Calculate resistance values for 4, 5, and 6-band resistors
- Get exact values with tolerance ranges
- Identify temperature coefficient for precision resistors
- Simple and intuitive user interface
- Comprehensive color code reference chart
Types of Resistor Color Codes:
- 4-Band Resistors: The most common type with two significant digits, a multiplier, and a tolerance band
- 5-Band Resistors: Used for precision resistors with three significant digits, a multiplier, and a tolerance band
- 6-Band Resistors: High-precision resistors with three significant digits, a multiplier, a tolerance band, and a temperature coefficient band
Applications:
- Electronics: Circuit design and troubleshooting
- Education: Learning about electronic components
- Engineering: Designing and prototyping electronic systems
- Hobbyist: DIY electronics projects
- Maintenance: Equipment repair and component verification
Understanding Tolerance:
The tolerance band indicates the maximum percentage that the actual resistance may vary from the nominal value due to manufacturing variations. For example, a 1000 Ω resistor with a ±5% tolerance could have an actual resistance between 950 Ω and 1050 Ω.
Temperature Coefficient:
The temperature coefficient of resistance (TCR) indicates how much the resistance value changes with temperature. It is measured in parts per million per degree Celsius (ppm/°C). Lower values indicate more stable resistors across different temperatures.
Perfect for students, engineers, electronics hobbyists, and professionals working with electronic circuits. Simply select the color bands on your resistor and get the precise resistance value instantly.