Resistor color code calculator

Read the resistance and tolerance from a four-band resistor’s colors.

Numbers Stateless

Quick guide

Try an example

You enter

First digit band
Brown
Second digit band
Black
Multiplier band
Red
Tolerance band
Gold

You get

Resistance (Ω)
1000
Tolerance
±5%
How it works and limits

Start at the end opposite the tolerance band. The first two colors give the digits, followed by the multiplier and tolerance.