Connect with us

Hi, what are you looking for?

Resistor color coding
Resistor color coding


Resistor Value Calculation Online | Resistor Color Coding

This simple Resistor Value Calculation Online Tool help you Calculate the Resistor color Coding. Just select the resistor color and get the value.

Each and every resistor were provided with colored layers for identifying its value. Each and every band has a value which should be used in addition to some criteria.
Resistor Colour Coding chart is provided for your reference.

To calculate the value of Resistor, follow these steps.

→ Firstly, Note the band colors and list those colors.
→ Secondly, With the help of the chart note down the respective value.
→ Thirdly, Write the value as such for Band 1 and Band 2. For Band 3, write it in terms of exponential power with respect to 10 as a base.
→ Tolerance can be written as ± with the respective percentage.

Tolerance value means the following resistor value can be within the limit. It’s difficult to provide exact value.

Chart for Resistor Color Coding:

BLACK 0             10^0
BROWN 1              10^1                1
RED 2              10^2                 2
ORANGE 3               10^3
YELLOW 4               10^4
GREEN 5               10^5               0.5
BLUE 6               10^6               0.25
VIOLET 7               10^7                0.1
GREY 8               10^8
WHITE 9               10^9
GOLD               10^-1                5
SILVER                10^-2               10
NONE                20

This can be easily memorized by using this Evergreen sentence

BB Roy Great Britain Very Good Wife


Now Let us see How to calculate the value of a resistor with an example.

Consider a Resistor having the following Color Sequence.

Band 1 = Red

Band 2 = Violet

Band 3 = Orange

Band 4 = Silver.

To calculate the value of a resistor, You should identify the respective digit. Neglect the digit for Gold and Silver


The digit for Red is 2

The digit for Violet is 7

The digit for Orange is 3

For band 1 and band 2 write the digit as such. For band 3, write it in terms of power.

So the value is 2 7 *10^3 ± 10%.

On simplification, we get 27000 with 10% tolerance. You can also write this as 27k ± 10%.

Practically, a resistance won’t become 0.


To find the resistor value easily use this simple calculator.


You May Also Like

Digital Logic Circuits

Excess-3 to BCD converter In this post on code conversions, we are going to see Excess-3 to BCD converter using k map technique.  K-map If you...

Embedded Systems

Many consider computer processors as the brain of a computing device, but in reality, these tiny little chips are glorified calculators which manipulate the...

Digital Logic Circuits

Laws Of Boolean Algebra The Laws Of Boolean Algebra is provided here. OR A + 0 = A A + A’ = 1 A...



About Soccer ball Soccer was first played in 1863. It has become one of the most popular games since then. This game is played...


Introduction: Long ago, people had no idea about the contents and effects of the food they eat. They ate everything that they found aesthetically...


National Football League is one of the most famous and well-played league in the world. It was established in 1920 by businessmen and his...


Many choices are available nowadays that select which league is best or not. Goals made per game played, point differential from first to last,...


Ghost in the shell is a sci-fiction written by Kazunori Itō, who is a screenwriter and artist. Ghost in the shell is his masterpiece,...


Introduction: Food is the basic need of life. Normally people do not focus on what they eat. They do not know the constituents and...