Resistor Information & Color Code Calculator

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 Color Code Explanation & Chart

Leaded resistor values are marked onto the body of the resistor using a series of colored bands. These give the value of the resistor as well as other information including the tolerance and sometimes the temperature coefficient. The band closest to the end of the resistor body is taken to be Band 1. The first two bands are the significant figures of the value, and the third is a multiplier, i.e. red black brown would be 2 0 x 101 or 200 ohms

 Color
Band 1

1st Figure

Band 2

2nd Figure

Band 3

3rd Figure

Band 4

Tolerance

Black
0
0
100
 
Brown
1
1
101
1%
Red
2
2
102
2%
Orange
3
3
103
 
Yellow
4
4
104
 
Green
5
5
105
 
Blue
6
6
106
 
Violet
7
7
107
 
Gray
8
8
108
 
White
9
9
109
 
Gold
   
10-1
5%
Silver
   
10-2
10%
None
     
20%


GRAPHICAL RESISTANCE CALCULATOR in JAVASCRIPT Version 2.0
by Danny Goodman (dannyg@dannyg.com)
Analyzed and described at length in  "JavaScript Bible" (IDG Books ISBN 0-7645-3022-4)
This program is Copyright 1996 by Danny Goodman.