Resistor Color Code Calculator

Decode a 4-band resistor color code to find its resistance value.

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Resistance

4,700 Ω

Resistance (k)4.700 kΩ

Resistance vs Band 1 Digit (0-9)

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Resistor Color Codes

4-Band System

  • Band 1: First digit
  • Band 2: Second digit
  • Band 3: Multiplier (10^x)
  • Band 4: Tolerance

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

    Example Calculation

    Yellow(4), Violet(7), Red(x100).

    1. 01Base = 4 x 10 + 7 = 47
    2. 02Multiplier = 10^2 = 100
    3. 03Resistance = 47 x 100 = 4700 ohms = 4.7k

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