Robolark
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Robolark
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Resistor Color Code Calculator

Select the color bands on the resistor to instantly calculate its resistance value and tolerance.

1st band = first digit
2nd band = second digit
3rd band = multiplier
4th band = tolerance
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Select band colors

How to Read a 4-Band Resistor

  • 1st Band – First digit of the resistance value
  • 2nd Band – Second digit of the resistance value
  • 3rd Band – Multiplier (adds zeros)
  • 4th Band – Tolerance (accuracy of the resistor)

ℹ️ Note: Actual resistor value may vary slightly based on tolerance. Always check tolerance for precision circuits.

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