Resistor Color Code Calculator
Decode 4, 5, and 6 band resistor values instantly.
Configuration
CALCULATED VALUE
--- Ω
Tolerance
--- %
TCR
--- ppm/°C
How to Read Resistor Color Codes
Resistor color codes are a system used to identify the resistance value, tolerance, and sometimes the temperature coefficient of axial lead resistors. This calculator supports 4-band, 5-band, and 6-band resistors.
Understanding the Bands
- 4-Band Resistors:
- Band 1: First significant digit.
- Band 2: Second significant digit.
- Band 3: Multiplier.
- Band 4: Tolerance.
- 5-Band Resistors (typically precision resistors):
- Band 1: First significant digit.
- Band 2: Second significant digit.
- Band 3: Third significant digit.
- Band 4: Multiplier.
- Band 5: Tolerance.
- 6-Band Resistors (typically precision resistors):
- Band 1: First significant digit.
- Band 2: Second significant digit.
- Band 3: Third significant digit.
- Band 4: Multiplier.
- Band 5: Tolerance.
- Band 6: Temperature Coefficient of Resistance (TCR).
Color Code Chart
| Color | Digit Value | Multiplier | Tolerance | TCR (ppm/K) |
|---|---|---|---|---|
| Black | 0 | x1 | - | 250 |
| Brown | 1 | x10 | ±1% | 100 |
| Red | 2 | x100 | ±2% | 50 |
| Gold | - | x0.1 | ±5% | - |
| Silver | - | x0.01 | ±10% | - |
Note: If a 4-band resistor does not have a fourth (tolerance) band, the tolerance is assumed to be ±20%.