Electronic Products
Resistor Colour code and calculator
Example shown
First band Brown = 1
Second band black = 0
Third band red = two zeros
Forth band gold = 5% tolerance
Value of resistor = 1000 ohms (1Kohms )
1st Digit 
2nd Digit 
Number of Zeros 
Tolerance 

Black 




Gold 5% 

Brown 




Silver 10% 

Red 




Orange 




Yellow 




Green 




Blue 




Violet 




Grey 



White 


If you find it hard to work out the codes with a table use the Resitor Calculator below to help you.
It is useful for checking you have used the above table correctly but you can't take a computer into your exam ! You will need to learn how to use a table.
To Calculate Resistor Values from Colour Codes Select colours from the pull down menus.
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