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General Information, Facts & Tables
[Resistor Colour Code Calculator]

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Overview

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The calculators below are designed to assist in the decoding and selection of colour coded resistors.
 

Resistor Colour Codes

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Colour

Black

Brown

Red

Orange

Yellow

Green

Blue

Purple

Grey

White

Gold

Silver

None

Value

0

1

2

3

4

5

6

7

8

9

-

-

-

Multiplier

x100

x101

x102

x103

x104

x105

x106

x107

x108

-

x10-1

x10-2

-

Tolerance

±20%

±1%

±2%

±3%

±4%

-

-

-

-

-

±5%

±10%

±20%

Failure Rate

-

1.0

0.1

0.01

0.001

 

 

 

 

*

 

 

 

*On film resistors this indicates solderable terminal, on composition resistors this indicates failures per 1000 hours. 

 

Resistor Decoder

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Band 1

Band 2

Band 3

Band 4

Band 5

Value

 

Resistor Encoder

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Value

Tolerance

Failure Rate

Colour Code

 
* = Preferred values