About Resistor Color Code & SMD Decoder
Decodes axial through-hole resistor color code stripes (4, 5, and 6 bands) with interactive visual resistor graphics, tolerance ranges, and temperature coefficients (PPM/K). Also decodes surface-mount device (SMD) 3-digit, 4-digit, and R-notation codes.
Key Capabilities & Features
- Interactive visual axial resistor graphic with real-time colored stripe updates
- Supports 4-band, 5-band (precision 1%), and 6-band (temperature coefficient PPM) codes
- Computes nominal resistance, tolerance percentage (±0.05% to ±10%), and min/max resistance range
- SMD resistor decoder supporting 3-digit (e.g. 103 = 10kΩ), 4-digit (4702), and R-decimal notation
- SI formatted resistance readouts in Ω, kΩ, and MΩ
How to Use Resistor Color Code & SMD Decoder
Select Resistor Mode
Choose between Through-Hole Color Bands or Surface Mount (SMD) decoder.
Pick Band Colors
Select colors for significant digits, decimal multiplier, and tolerance.
Inspect Resistance & Tolerance
View the formatted resistance value and acceptable component variance range.
Privacy & In-Browser Execution Guarantee
100% private in-browser electronics decoder.
Frequently Asked Questions
What does the 6th band on a resistor indicate?
The 6th band indicates the temperature coefficient of resistance (TCR) expressed in parts per million per Kelvin (ppm/K), defining how much the resistance drifts with temperature changes.
How do you read a 3-digit SMD resistor code?
The first two numbers are significant digits, and the third number is the 10-multiplier exponent. For example, 103 means 10 × 10³ = 10,000 Ω (10 kΩ).