Resistor Color Code Decoder
Select the colors of the bands on your resistor to decode its resistance and tolerance instantly.
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Select the band colors below.
Tolerance
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Temperature coeff.
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Series
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How to use
- Choose whether your resistor has 4, 5 or 6 bands.
- Click a color for each band — the resistor picture updates live.
- The resistance value, tolerance and extra details appear at the top.
Note: Gold and silver are only valid as multiplier and tolerance bands. If a band has no valid color, the tool will tell you.
Frequently Asked Questions (FAQ)
How do I decode a resistor?
Select the number of bands (4, 5 or 6), then pick each band color to read the resistance value, tolerance and rating instantly.
What is the difference between 4, 5 and 6 band resistors?
Five-band resistors add a precision digit; six-band resistors also show the temperature coefficient.
Is it free and private?
Yes, it is free, needs no signup, and runs in your browser.