# How To Read Resistor Color Codes? A Step-By-Step Guide

## How to Read Resistor Color Codes

Resistors are one of the most common components in electronic circuits, and they play an important role in controlling the flow of current. Each resistor has a specific resistance value that is indicated by a set of colored bands on its body. Learning how to read these color codes is essential for anyone interested in working with electronics.

In this article, we’ll explain the basics of resistor color codes and provide a step-by-step guide for reading them.

Check Here Our Resistor Color Code Calculator: Rcccalculator.com

## Understanding the Color Code System

Resistor color codes use a system of colored bands to indicate the resistance value of a particular resistor. There are two main types of resistor color codes: four-band and five-band.

### Three-Band Resistors

Three-band resistors have three colored bands that indicate their resistance value. The first two bands represent the significant digits of the resistance value, while the third band represents the multiplier (i.e., how many zeros come after those first two digits).

The colors used for each digit and multiplier are the same as for four-band resistors.

### Four-Band Resistors

Four-band resistors have four colored bands that indicate their resistance value. The first two bands represent the first two digits of the resistance value, while the third band represents the multiplier (i.e., how many zeros come after those first two digits). The fourth band indicates the tolerance, which is a measure of how close the actual resistance value is to its stated value.

The colors used for each digit and multiplier are as follows:

The colors used for multipliers are as follows:

The tolerance band can be any of the following colors:

• Gold (5%)
• Silver (10%)

### Five-Band Resistors

Five-band resistors work similarly to four-band resistors but have an additional band that represents a second significant digit. This allows for more precise values than four-band resistors. The first three bands represent the significant digits, the fourth band represents the multiplier and the fifth band represents tolerance.

### Six-Band Resistors

Six-band resistors have six colored bands that indicate their resistance value. The first three bands represent the significant digits of the resistance value, while the fourth band represents the multiplier (i.e., how many zeros come after those first three digits). The fifth and sixth bands indicate tolerance values.

The colors used for each digit, multiplier, and tolerance are different from four- and five-band resistors.

## How To Read Resistor Color Codes?

Here you can find the step-by-step guide on How To Read Resistor Color Codes:

To read a three-band resistor’s color code:

1. Identify which end of the resistor is which. One end will usually be slightly longer than the other.
2. Look at each colored band from left to right.
3. Match each colored band to its corresponding digit or multiplier using the tables above.
4. Write down each digit/multiplier as you go along.
5. Combine your digits into one number (e.g., if you have brown-black-red bands, your number would be “1” + “0” = “10”).
7. This final result is your resistor’s resistance value in ohms.

For example, let’s say you have a resistor with brown-black-red bands:

So our final answer would be:

``````(10 * 10^2) ohms
= 1000 ohms``````

To read a four-band resistor’s color code:

1. Identify which end of the resistor is which.
• One end will usually be slightly longer than the other.
2. Look at each colored band from left to right.
• Ignore any gold or silver bands; these are not part of indicating resistance.
3. Match each colored band to its corresponding digit or multiplier using the tables above.
4. Write down each digit/multiplier as you go along.
5. Combine your digits into one number (e.g., if you have brown-black-red-gold bands, your number would be “1” + “0” + “2” = “102”).
7. This final result is your resistor’s resistance value in ohms.

For example, let’s say you have a resistor with brown-black-red-gold bands:

• Brown = “1”
• Black = “0”
• Red = “2”
• Gold = +/-5%

So our final answer would be:

``````(10 * 10^2) +/-5%
=1000 +/-50 ohms``````

Reading five-band resistors works similarly to reading four-band resistors except there’s an additional digit before our multiplier.

Here’s what you need to do:

1. Identify which end of your resistor corresponds with which side.
2. Starting from left to right identify every color-coded stripe/band on it:
• First stripe: It represents tens of thousands of place
• Second stripe: It represents thousands of place
• Third stripe: It represents hundreds of place
• Fourth stripe: It’s always silver/gold; it represents decimal multipliers
• Fifth Stripe: It’s always gold/silver; it indicates tolerances
3. Determine each color-coded strip according to its corresponding table mentioned above. 4. Combine all numbers obtained from steps one through three together 5. Multiply combined numbers with decimal multipliers (fourth stripe) 6. This final result is your resistor’s resistance value in ohms.

For example, let’s take blue-green-red-silver-brown,

• Blue=6,
• Green=5,
• Red=2,
• Silver=0.01,
• Brown=+/−1%

To read a six-band resistor’s color code:

1. Identify which end of the resistor is which. One end will usually be slightly longer than the other.
2. Look at each colored band from left to right.
3. Match each colored band to its corresponding digit or multiplier using tables available online or in reference books.
4. Write down each digit/multiplier as you go along.
5. Combine your digits into one number (e.g., if you have brown-black-green-gold-silver-red bands, your number would be “1” + “0” + “5” = “105”).
7. This final result is your resistor’s resistance value in ohms.

For example, let’s say you have a resistor with brown-black-green-gold-silver-red bands:

So our final answer would be:

``````(105*0.1) +/-10% tolerance
= 10.5 +/-1.05 ohms``````

## Conclusion

In conclusion, reading resistor color codes is an essential skill for anyone interested in working with electronics. By understanding the basics of resistor color codes and following our step-by-step guide, you can easily determine the resistance value of any resistor using its colored bands. Whether you’re a beginner or an experienced electronics enthusiast, mastering this skill will help you to design and troubleshoot electronic circuits with ease. So keep practicing and don’t hesitate to refer back to our tables and examples whenever you need a refresher. With practice, you’ll be able to read resistor color codes quickly and accurately like a pro!

## FAQs

### How do you read a resistor for dummies?

Reading a resistor might seem daunting at first, but it’s actually quite simple. Here are the basic steps to follow:

Look for the color bands on the resistor. Resistors usually have four or five colored bands.
Identify the first two bands and determine their values based on the resistor color code chart.
Determine the multiplier of the third band using the same chart.
Calculate the resistance value by combining the values of both digits and multiplying it with the multiplier.

For example, if you see a resistor with color bands brown, black, red, and gold, this means that its resistance value is 10 x 1 = 10 ohms with a tolerance of +/-5%.

### How do you identify resistor codes?

Resistor codes are used to indicate their resistance values and tolerances. Here’s how to decode them:
Look at the color of each band on the resistor.

Use a resistor color code chart to determine what each color represents in terms of numbers.
The first two bands represent significant figures while the third band represents a multiplier.
The fourth band indicates tolerance.

For example, if you see a resistor with the colors yellow-violet-red-gold (from left to right), this means that its resistance value is 47 x 10^2 ohms (or 4,700 ohms) with a tolerance of +/-5%.