Resistor Calculator

4-band and 5-band resistor color code decoder with tolerance and min/max range.

Calculator Numbers & Math Updated Apr 20, 2026
How to Use
  1. Pick band type (4 or 5), then select colors.
  2. Resistance value + tolerance range updates live.
Bands
Resistance

Color code

4-band
digit · digit · multiplier · tolerance
5-band
digit · digit · digit · multiplier · tolerance

Last updated: