🎨 Resistor Color Code Calculator

🎯 Getting Started

This calculator works both ways:

• Colors to Resistance: Select colors from the dropdowns to decode a resistor's value
• Resistance to Colors: Enter a resistance value and tolerance to find the color code

Choose between 4-band (standard) and 5-band (precision) resistors using the band selector.

🌈 Color Code System

4-Band Resistors: Band1 (1st digit) + Band2 (2nd digit) + Band3 (multiplier) + Band4 (tolerance)

5-Band Resistors: Band1 (1st digit) + Band2 (2nd digit) + Band3 (3rd digit) + Band4 (multiplier) + Band5 (tolerance)

Color Values:

• Black = 0, Brown = 1, Red = 2, Orange = 3, Yellow = 4
• Green = 5, Blue = 6, Violet = 7, Grey = 8, White = 9

📐 Tolerance Values

• Brown: ±1% (precision)
• Red: ±2%
• Green: ±0.5% (high precision)
• Blue: ±0.25% (ultra precision)
• Violet: ±0.1% (ultra precision)
• Gold: ±5% (standard)
• Silver: ±10%
• None: ±20% (4-band only)

💡 Tips

• The visual resistor updates in real-time as you change values
• In reverse mode, the calculator finds the closest standard E-series value
• Gold and Silver bands can only be used as multipliers (×0.1, ×0.01) or tolerance
• 5-band resistors provide one extra digit of precision