Resistor Color Code Challenge

Read the color bands, enter the resistance value, and check your answer. Supports 4-band and 5-band resistors.

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Bands: 4

Your Answer

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Streak
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Quick Reference

Digits (Band 1–3)

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

Multiplier (Band 3/4)

  • Silver = ×0.01
  • Gold = ×0.1
  • Black = ×1
  • Brown = ×10
  • Red = ×100
  • Orange = ×1k
  • Yellow = ×10k
  • Green = ×100k
  • Blue = ×1M
  • Violet = ×10M

Tolerance (Last Band)

  • Brown = ±1%
  • Red = ±2%
  • Green = ±0.5%
  • Blue = ±0.25%
  • Violet = ±0.1%
  • Grey = ±0.05%
  • Gold = ±5%
  • Silver = ±10%

4-band: [Digit 1][Digit 2][Multiplier][Tolerance] • 5-band: [Digit 1][Digit 2][Digit 3][Multiplier][Tolerance]

Tip: Enter the number and choose the unit (Ω, kΩ, or MΩ), then press Check.