Resistor Colour Code Calculator

   

Ist
band
2nd
band
3rd
band
4th
band
Enter band colours on the left to see the resistor value below


Resistor Accuracy = Resistor Value =

After using the calculator, please select the nearest "preferred" value
of resistor from the list below.
(eg. If calculated resistor = 135 then go up to 150):

PREFERRED RESISTOR VALUES (these are the values you can normally obtain)
22 - 27 - 33 - 47 - 56 - 68 - 100 - 120 - 150 - 180 - 220 - 270 - 330 - 390 - 470 - 560 - 680 - 820 - 1000


Example Resistor:
(Try inserting its colours above & then checking
its value by using a real resistor & multimeter).

     1st  band blue = 6
     2nd band grey = 8
     3rd  band red = 2 = number of zeros (00)
     4th  band gold = + or - 5 % accuracy

The resistance = 6800 ohms or 6.8K ohms. It has a + or - 5% accuracy or tolerance.
{blue "6" grey "8" red "00"and gold "+ or - 5%"},

By using the unit "K ohms" and "M ohms" you can reduce the number of 0's you need to write:

1K ohm = 1000 ohms and 1M ohm = 1000000 ohms.