How to calculate the value of resistance by color code method

Do you know you can calculate an electronic component value by just taking a look on that. In this article I will explain you a way to know the value of resistance by color code method. It is a simple technique known as a color code method. In this technique you just have to go through two step and you will know the value of Resistance.


Resistance is a electronic component which is used for the purpose of opposing the current flow. It's unit is ohm. It is mostly used component in any elctronic project or you can say in electronics instrument. This component help us to maintain the proper flow of current inside the circuit.Now with the help of this article you are gonna learn a method to determine the value of this widely used component. I have divided this method in two different for better understanding.

Part-1 Instruction

When you take a look on any resistance you can easily find that that there will be four different color. Color help us to determine the value of resistance so we call it Color code method. As I said there will be four different color which help us to determine the value of resistance and these four different color have some unique value. the fourth color is known as the tolerance band. Tolerance band is mainly used for the purpose of maintainance of aging effect.
you can follow the given below table for calculation of the color code of any resistance, which is arranged in alphabetical order.
No. Color Code
1. Black 0
2. Blue 6
3. Brown 1
4. Green 5
5. Grey 8
6. Orange 3
7. Red 2
8. Violet 7
9. White 9
10. Yellow 4

Value of fourth band or Tolerance band will be following.

1. Gold = (+,-) 5%
2. Silver = (+,-) 10%
3. No Color = (+,-) 20%

Part-2 Formula

you have to follow given below way for arranging the value in the formula.
1. First band (color) code value at the unit digit.
2.Second band (color) code value at the 10th place.
3.Third band (color) code vale takes that much zero's to 100th place.
4. Fourth band is tolerance band.

Value of Resistance = A (unit place), B(second place), N no. of zero's (100th place, where N is value of color code), (+,-) Tolerance band color code value


If a resistance have color code arrangement in a given below way.

Related Articles

A Study About Electronics Components

This article gives a detailed study about the electronic components which are used in our day today life. The electronic components, their types and the way which they make are also written in it. Its a valuable article in the field of electronics. So read and make a knowledge about it.

Colour coding of resistor

In this article a brief and clear explanatinon is given about the method used in colour coding of resistors. It is simple and interesting. It is very much important to know the colour coding mehod to identify the value of resistor given by a manufacturer.Value of resistance can be found accurately using this method. Here explanation is given along with necessary listings and examples.

How To Control Anger?

Have you ever been angry and later on felt sad for being angry on some one or something? Do you want to control your anger ? Is anger good or not ? The following article will discuss about anger and measures through which we can control our anger.

How to remove blood stains from delicate fabrics and specific surfaces?

This article explains various tips and methods to get rid of blood stains from delicate fabrics like silk, satin, woolen, linen etc and from specific surfaces like concrete, hardwood floors, mattress, quilt, leather, carpets etc. These methods used can make them free from blood stains.

More articles: Resistor Color code How to


No responses found. Be the first to comment...

  • Do not include your name, "with regards" etc in the comment. Write detailed comment, relevant to the topic.
  • No HTML formatting and links to other web sites are allowed.
  • This is a strictly moderated site. Absolutely no spam allowed.
  • Name: