# 4, 5, 6 Band Resistor Color Code Calculator

## Blog

**Resistor color codes**are a standard system for indicating the value of resistors in electronic circuits. Understanding how to read these codes is an essential skill for anyone working with electronic components, whether you are an electrical engineer, a DIY enthusiast, or a student just starting out in the field.

In this article, we will provide a detailed overview of resistor color codes, including how they work, how to read them, and some common variations and exceptions to the standard system. By the end of this guide, you should have a strong understanding of this important topic and be able to decode resistor color codes with ease.

*So let’s dive in!*

## What is Resistor Color Codes?

Resistor color codes are a system for indicating the value of a resistor using a combination of colored bands painted onto the resistor body. The number of bands and the colors used can vary depending on the type of resistor, but the most common system uses four or five bands to indicate the value of the resistor in ohms.

For example, a four-band resistor with the colors red, green, blue, and gold might have a value of 2700 ohms, while a five-band resistor with the colors red, red, orange, gold, and brown might have a value of 2.2 kilohms.

## How Do Resistor Color Codes work?

Resistor color codes work by using a combination of colors to represent different numerical values. Each color corresponds to a specific number, and the combination of colors indicates the overall value of the resistor.

For example, in the most common system, the first two bands on a four-band resistor represent the first two significant digits of the resistance value, while the third band represents the number of zeros to add to the end of the value. The fourth band, known as the tolerance band, indicates the allowable error or deviation from the nominal resistance value.

Here is a table showing the colors and corresponding values for each band in the most common resistor color code system:

## Resistor Color Codes Chart

Band | Color | Value |
---|---|---|

1 | Black | 0 |

2 | Brown | 1 |

3 | Red | 2 |

4 | Orange | 3 |

5 | Yellow | 4 |

6 | Green | 5 |

7 | Blue | 6 |

8 | Violet | 7 |

9 | Gray | 8 |

10 | White | 9 |

For example, if the first band on a four-band resistor is red and the second band is green, the resistance value would be 27. If the third band is blue, the resistance value would be 2700 ohms, since there are three zeros after the 27. If the fourth band is gold, the tolerance of the resistor would be +/- 5%.

To decode a five-band resistor, you simply follow the same process but with an additional band for the third significant digit. For example, a five-band resistor with the colors red, red, orange, gold, and brown would have a resistance value of 2.2 kilohms, with a tolerance of +/- 5%.

It’s important to note that the order of the bands is important when reading resistor color codes. The first band is always the first significant digit, the second band is always the second significant digit, and so on. You should always read the bands from left to right.

## Variations and Exceptions to the Standard System

While the standard resistor color code system is widely used and is generally easy to understand, there are a few variations and exceptions to be aware of.

One common variation is the use of a three-band system for low-value resistors. In this system, the first two bands represent the first two significant digits of the resistance value, while the third band represents the number of zeros to add to the end of the value. The tolerance of the resistor is not indicated in this system, as it is assumed to be +/- 20%.

Another variation is the use of a six-band system for high-precision resistors. In this system, the first three bands represent the first three significant digits of the resistance value, while the fourth band represents the number of zeros to add to the end of the value. The fifth band indicates the tolerance of the resistor, and the sixth band is used to indicate the temperature coefficient of the resistor.

There are also a few exceptions to the standard resistor color code system that you should be aware of. One exception is the use of a red tolerance band, which indicates a tolerance of +/- 2%. Another exception is the use of a silver tolerance band, which indicates a tolerance of +/- 10%.

It’s also worth noting that not all resistors use the standard color code system. Some resistors, such as precision resistors or resistors with a very high resistance value, may use a different system or may not have any color bands at all. In these cases, you may need to consult the manufacturer’s specifications or use a resistance meter to determine the value of the resistor.

## How To Read Resistor Color Codes

Reading resistor color codes is a vital skill for anyone working with electronic components, whether you are an electrical engineer, a DIY enthusiast, or a student just starting out in the field. Resistor color codes are a standard system for indicating the value of a resistor using a combination of colored bands painted onto the resistor body.

In this article, we will provide step-by-step instructions for reading resistor color codes, including tips for handling common variations and exceptions to the standard system. By the end of this guide, you should be able to decode resistor color codes with ease.

### Step 1: Determine the Number of Bands

The first step in reading resistor color codes is to determine the number of bands on the resistor. Most resistors have four or five bands, but some may have three or six. The number of bands determines how you will read the resistor value.

**Four-band resistors**: Four-band resistors use the standard color code system, with the first two bands representing the first two significant digits of the resistance value, the third band representing the number of zeros to add to the end of the value, and the fourth band indicating the tolerance of the resistor.**Five-band resistors**: Five-band resistors use the same system as four-band resistors, but with an additional band for the third significant digit.**Three-band resistors**: Three-band resistors use a variation of the standard color code system, with the first two bands representing the first two significant digits of the resistance value and the third band representing the number of zeros to add to the end of the value. The tolerance of the resistor is not indicated in this system, as it is assumed to be +/- 20%.**Six-band resistors**: Six-band resistors use a variation of the standard color code system, with the first three bands representing the first three significant digits of the resistance value, the fourth band representing the number of zeros to add to the end of the value, the fifth band indicating the tolerance of the resistor, and the sixth band indicating the temperature coefficient of the resistor.

### Step 2: Identify the Colors of the Bands

Once you have determined the number of bands on the resistor, the next step is to identify the colors of the bands. You can use a resistor color code chart, like the one provided earlier in this article, to help you determine the corresponding values for each color.

It’s important to note that the order of the bands is important when reading resistor color codes. The first band is always the first significant digit, the second band is always the second significant digit, and so on. You should always read the bands from left to right.

### Step 3: Calculate the Resistance Value

Once you have identified the colors of the bands, the next step is to calculate the resistance value of the resistor.

For four-band and five-band resistors, you can use the following formula to calculate the resistance value:

Resistance value = (first significant digit * 10) + second significant digit + (third significant digit * 10^number of zeros)

For example, if the first band on a four-band resistor is red and the second band is green, the resistance value would be 27. If the third band is blue, the resistance value would be 2700 ohms, since there are three zeros after the 27.

For three-band resistors, you can use the same formula but omit the third significant digit and the number of zeros.

### Step 4: Determine the Tolerance

The final step in reading resistor color codes is to determine the tolerance of the resistor. The tolerance is the allowable error or deviation from the nominal resistance value and is typically expressed as a percentage.

For four-band and five-band resistors, the tolerance is indicated by the fourth or fifth band, respectively. You can use a resistor color code chart to determine the tolerance for each color.

It’s important to note that there are a few exceptions to the standard tolerance values. A red tolerance band indicates a tolerance of +/- 2%, while a silver tolerance band indicates a tolerance of +/- 10%.

For three-band resistors, the tolerance is assumed to be +/- 20%.

## Resistor Color Code Calculator Mobile App Download

## Tips for Reading Resistor Color Codes

**Here are a few tips to help you read resistor color codes with ease:**

**Use a resistor color code chart**: A resistor color code chart is a useful tool for quickly determining the value of each color. You can find these charts online or in electronic component reference materials.**Practice reading different codes**: The more you practice reading resistor color codes, the easier it will become. Try decoding a variety of different codes to get a feel for the system.**Don’t rely on your eyesight**: Colors can sometimes appear differently under different lighting conditions or when viewed from different angles. It’s important to use a resistor color code chart or a resistance meter to accurately determine the value of the resistor.

Reading resistor color codes is an essential skill for anyone working with electronic components. By following the steps outlined in this guide and using a resistor color code chart, you should be able to decode resistor color codes with ease. With practice, you’ll be able to quickly and accurately determine the resistance value and tolerance of any resistor. You can simply use our own calculator on **R****cccalculator.com**

## Conclusion

Resistor color codes are an important tool for indicating the value of resistors in electronic circuits. By understanding how to read these codes, you can easily determine the resistance value of a resistor and choose the right resistor for your circuit. While there are a few variations and exceptions to the standard system, the basic principles of resistor color codes are easy to understand and apply.

I hope this article has helped you gain a deeper understanding of resistor color codes and how they work. If you have any further questions or need clarification on any of the topics discussed, please don’t hesitate to ask. Good luck with your resistor decoding endeavors!

## Frequently Asked Questions (FAQs)

### How do you read resistor color codes?

To read resistor color codes, you will need to determine the number of bands on the resistor, identify the colors of the bands, and calculate the resistance value and tolerance based on the standard color code system. You can use a resistor color code chart or a tool like RCCCalculator.com to help you decode the codes. It’s important to note that the order of the bands is important, and you should always read them from left to right.

### What are the resistor color code colors?

The standard resistor color code system uses seven colors to indicate the value and tolerance of a resistor. The colors are black, brown, red, orange, yellow, green, blue, violet, gray, and white. Each color corresponds to a specific value or tolerance, and the combination of colors is used to indicate the resistance value and tolerance of the resistor.

### What color is a 50 ohm resistor?

The color of a resistor does not directly indicate its resistance value. Instead, resistor values are indicated using a combination of colored bands painted onto the resistor body. To determine the resistance value of a resistor, you will need to read the color code according to the standard system. A 50 ohm resistor would have a brown band for the first significant digit (5), a green band for the second significant digit (0), and a brown band for the number of zeros (1). The tolerance of the resistor would be indicated by the fourth band.

### How do you read a 4 band resistor color code?

To read a 4 band resistor color code, you will need to identify the colors of the first three bands and the tolerance band. The first band represents the first significant digit, the second band represents the second significant digit, and the third band represents the number of zeros to add to the end of the value. The fourth band indicates the tolerance of the resistor. You can use a resistor color code chart or a tool like RCCCalculator.com to help you decode the code.

### What is the easiest way to memorize resistor colors?

One way to memorize resistor colors is to use mnemonic devices, such as rhymes or phrases. For example, you could use the phrase “Black Bad Boys Run But Violet Violet’s Very Very Fine” to remember the order of the color code bands. Another approach is to practice reading resistor color codes and using a resistor color code chart regularly, which can help you commit the colors to memory over time. It may also be helpful to create flashcards or use online resources to help you learn and practice the color code system.