🎨 Resistor Color Code Calculator
Decode resistor color bands or find color codes for specific resistance values. Supports 4, 5, and 6-band resistors.
Select Colors
Visual Representation
Ready to Calculate
Select color bands to decode the resistance value
Color Code Reference
Tolerance & Temp Coefficient
Tolerance
Temperature Coefficient (6-band)
Understanding Resistor Color Codes
4-Band Resistor: Two significant digits + multiplier + tolerance. Most common for ±5% and ±10% resistors.
5-Band Resistor: Three significant digits + multiplier + tolerance. Used for precision resistors (±1%, ±2%).
6-Band Resistor: Three significant digits + multiplier + tolerance + temperature coefficient. For high-precision applications.
Reading Direction: The tolerance band (gold/silver) is typically on the right. If uncertain, check which end has a band closer to the edge.
Tip: Memorize "BB ROY of Great Britain had a Very Good Wife" for the digit sequence (Black, Brown, Red, Orange, Yellow, Green, Blue, Violet, Gray, White).
Disclaimer
This calculator is provided as-is for educational and informational purposes only. While we strive for accuracy, always verify calculations with professional standards and local electrical codes. Use at your own risk. For critical applications, consult a licensed professional electrician.
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