Resistor Color Code Calculator

Calculate resistance values using the standard color code system

Number of Bands:

100.00 Ω

±5% tolerance

First Band

Second Band

Multiplier

Tolerance

Quick Guide

How to Read Color Bands:

First Band: First significant figure
Second Band: Second significant figure
Third Band (5-6 bands): Third significant figure
Multiplier Band: Number of zeros to add
Tolerance Band: Resistance tolerance
Temperature Coefficient (6 bands): PPM/K value

Common Examples:

Red-Violet-Orange

27 × 1000 = 27kΩ

Brown-Black-Green

10 × 100000 = 1MΩ

Tips

Always read bands from left to right
The tolerance band is typically gold or silver
Hold the resistor with the tolerance band on the right
Clean the resistor surface for better color visibility
Use good lighting to distinguish similar colors
When in doubt, use a multimeter to verify