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.

Yes, it is free, needs no signup, and runs in your browser.

Select the colors of the bands on your resistor to decode its resistance and tolerance instantly.

Number of bands

—

Select the band colors below.

Tolerance

—

Temperature coeff.

—

Series

—

Note: Gold and silver are only valid as multiplier and tolerance bands. If a band has no valid color, the tool will tell you.