What is The Color Code For a 100 ohm Resistor?

Are you wondering about the color code for a 100 ohm resistor? If so, you have come to the right place. In this article, we will provide you with everything you need to know about the color code for a 100 ohm resistor. We will discuss what it is, how to read it, and what each color means. So let’s get started.

What is The Color Code For a 100 ohm Resistor?

Understanding Resistors

A resistor is an electronic component that resists the flow of electric current. It is used to reduce the amount of current flowing through a circuit or to divide the voltage in a circuit. Resistors come in different values and sizes, and they are marked with a color code that indicates their resistance value.

The Color Code for 100 Ohm Resistor

The color code for a 100-ohm resistor consists of four colored bands that are painted around the body of the resistor. Each band represents a digit or multiplier that is used to calculate the resistance value of the resistor.

Decoding The Colors

The first band represents the first digit of the resistance value, which is always zero for a 100 ohm resistor. The second band represents the second digit of the resistance value, which is also zero for a 100 ohm resistor. The third band represents the multiplier value, which determines how many zeros should be added after the two digits. The fourth band represents the tolerance value, which indicates how much variation there can be in the actual resistance value compared to its nominal (specified) value.

So what do these colors mean? Here’s a breakdown:

  • Black: Represents zero
  • Brown: Represents one
  • Red: Represents two
  • Orange: Represents three
  • Yellow: Represents four
  • Green: Represents five
  • Blue: Represents six
  • Violet: Represents seven
  • Gray: Represents eight
  • White: Represents nine

In addition to these basic colors, there are also gold and silver bands that represent tolerance values:

  • Gold: Indicates ±5% tolerance
  • Silver: Indicates ±10% tolerance

Using these colors and their corresponding values, we can determine that a 100 ohm resistor has four bands colored brown-black-brown-gold.

To calculate its resistance value use this color code:

  1. Identify each color and its corresponding number (in this case brown = 1, black = 0, brown = 1).
  2. Combine these numbers into two digits (in this case 10).
  3. Multiply those two digits by ten raised to the power of the third band’s number (in this case gold = -1), resulting in our total resistance of 100 Ohms.
  4. Finally check tolerance by looking at the fourth band’s color(gold=±5%, silver=±10%).


Knowing how to read resistor color codes correctly can save time and frustration when working on electronic circuits or projects involving resistors. As we have seen here today with our example of “What is The Color Code For a 100 ohm Resistor”, reading them isn’t too difficult once you understand what each colored band means.


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