Resistor Color

Decode or encode resistor colour bands (3–6 bands) to resistance and tolerance.

About this tool

Read or generate 4-, 5- or 6-band resistor color codes.

How to use

  • Pick the band count, then either select bands (top to bottom) or type a value.
  • Resistance, tolerance, valid range and TCR (6-band) are reported.

Encoding

4-band = 2 digits + multiplier + tolerance. 5-band = 3 digits + multiplier + tolerance. 6-band = 5-band + temperature coefficient.