Resistor Color Code Calculator

4-Band

5-Band

6-Band

First Digit	Second Digit	Multiplier	Tolerance
1 Brown 2 Red 3 Orange 4 Yellow 5 Green 6 Blue 7 Violet 8 Gray 9 White	0 Black 1 Brown 2 Red 3 Orange 4 Yellow 5 Green 6 Blue 7 Violet 8 Gray 9 White	x1 Black x10 Brown x100 Red x1000 Orange x10000 Yellow x100000 Green x1000000 Blue x10M Violet x100M Gray x1G White x0.1 Gold x0.01 Silver	± 1% Brown ± 2% Red ± 3% Orange ± 4% Yellow ± 0.5% Green ± 0.25% Blue ± 0.10% Violet ± 0.05% Gray ± 5% Gold ± 10% Silver
Resistance :
Tolerance :

A resistor is identified by its pattern of color of bands. There are 4, 5 and 6 band resistors. To calculate the resistance of a resistor, you can select the appropriate color bands in the above resistor color code calculator.

How to calculate the resistance?

Just have a look to the resistor color code chart below and see the calculations, how the resistance value is calculated according to this chart.

Calculating resistance for a 4-band resistor

Where, ‘a’ represents the 1^st significant digit, which is the first band color of resistor. ‘b’ represents the 2^nd  significant digit, which is the second band color of resistor. ‘c’ represents the 3^rd significant digit, which is the third band color of resistor and this is the multiplier value. ‘d’ represents the 4^th  significant digit, which is the fourth band color of resistor and this is the tolerance value.

4-Band	Name	Description
1st Band	a	1st significant digit
2nd  Band	b	2ndsignificant digit
3rd  Band	c	Multiplier
4th  Band	d	Tolerance

Let’s take an example of a 4-band resistor with the colors given in the above image (brown, blue, red and gold). So according to the formula the resistance will be: 16 * 100  = 1600 Ohms or 1.6K Ohms with 5% tolerance.