What is the Color Code for a 1K Resistor? A Quick Guide

So you want to know What is the Color Code for a 1K Resistor? The answer is Brown, Black, Orange, and Gold.

Resistor color code plays an important role in the understanding and identification of resistors. The resistor color code is based on a standard set of stripes that were assigned to represent different values. This guide will provide easy techniques for memorizing and understanding the resistor color code so that you can quickly identify any resistor.

Resistors are an essential component in any electrical circuit. In a basic circuit, a component’s resistance limits the flow of current through it, allowing designers to customize their circuits. The value of the resistor is determined by its ohmic resistance, which is measured in ohms (Ω). The most common way to determine the value of a resistor is by reading off the stripes found on its body, known as the resistor color code.

The Resistor Color Code uses colored striping or bands to indicate its ohmic values as well as its tolerance and working temperature range. Knowing how to interpret and memorize this code can help save time when dealing with resistors in any circuit design or experiment. With that said, this guide will lay out easy techniques to help with understanding and memorizing the Resistor Color Code.

What is the Color Code for a 1K Resistor?

Brown, Black, Orange, and Gold
  • The first band is brown, which represents the first significant digit of the resistance value.
  • The second band is black, which represents the second significant digit of the resistance value.
  • The third band is orange, which represents the multiplier. In this case, orange represents a multiplier of 1,000.
  • The fourth band is gold, which represents the tolerance level of the resistor. In this case, gold represents a tolerance of ±5%.

A 1K resistor is a commonly used resistance value in electronics. It has an ohmic value of 1000Ω (1K) and comes with various tolerance values and power ratings. To read its color code, you will need to know the colors associated with each band, their respective positions on the resistor body, and what they stand for.

The first two bands represent the first two digits of the resistance value in ohms (Ω):

  • Brown: 1
  • Black: 0

The third band indicates its tolerance value:

  • Brown: ±1%
  • Black: ±2%
  • Red: ±5%
  • Orange: ±10%
  • Yellow: ±20%
  • Green: ±0.5%
  • Blue: ±0.25%
  • Violet: ±0.1%
  • Grey: +/-0.01%
  • White: +/-10%
  • Gold: 5%

The fourth band is typically used to indicate power rating in watts (W):

  • Brown = 1/8W (125mW)
  • Red = 1/4W (250mW)
  • Orange = 1/2W (500mW)
  • Yellow = 1W
  • Blue = 2W
  • Grey = 4W

If there is a fifth band present on the resistor body, it indicates its temperature coefficient or working temperature range :

  • Brown = -55°C to +85°C
  • Blue = -40°C to +125°C
  • Orange = -20°C to +150°C
  • Yellow = 0°C to +150°C .Red = 0°C to +200°C .White= -50 ° C to +70 ° C

Therefore, if you come across a resistor with brown-black-brown-yellow-brown stripes on it’s body it implies that it is a 1K +/-1% tolerant resistor rated at one Watt (−55° C – 85 ° C).

Understanding the Color Code for Resistors

The Resistor Color Code is used to indicate the ohmic values, tolerance, and operating temperature range of a resistor. Each color band or stripe on a resistor body represents either the first two digits of its resistance value in ohms (Ω), the power rating of the resistor, its tolerance value, or its working temperature range.

To read and interpret a resistor’s color code, you’ll need to know what each color stands for as well as their respective positions on the body of the resistor. The first two bands are typically used to determine the resistance value in ohms (Ω) while the third band specifies its tolerance value. The fourth band indicates its surge power rating. If there is a fifth band present, it will tell you about the temperature coefficient or working temperature range of the part. Let’s take a closer look at each component of this code in order to understand how they work together.

Common Mistakes and Troubleshooting

When reading the resistor color code, it is important to remember that some colors might be difficult to differentiate from one another. The colors can sometimes look faded or washed out due to wear and tear. This can be a common source of mistakes when attempting to read the resistor color code. Additionally, if the resistor has more than four bands, confusion over which band stands for can occur.

It’s always helpful to double-check your reading of the color codes whenever possible. If you are finding it difficult to identify the exact colors, try using a magnifying glass or a powerful flashlight to get a better view of its markings. If the resistor has more than four bands, make sure to review the position of each band against the standard color band guide on websites such as Digi-Key or Arrow Electronics for further clarity.

When in doubt about your identification, don’t rely solely on visual inspection but instead use a digital multimeter (DMM) for verification purposes. Resistance test measurements should always be done with power off and you may need an adapter for alligator clips depending on your DMM’s connections type (banana plugs, mini clip etc). With modern DMMs there are auto-ranging modes so you don’t need to worry about setting specific resistance ranges; just let it do its thing!


Understanding the resistor color code is an essential skill for any electronics enthusiast or engineer. Resistor color codes can help identify the value of a resistor quickly, without having to use complex measuring equipment. In addition to knowing the values of each band, it’s also important to recognize differences in color between bands; differentiating dark grey from light grey or gold from yellow, for example. It’s also important to remember that multiple band resistors will have a four-number code instead of a three-number one, and be aware of the positioning of each band in order to correctly identify its value.

Overall, understanding and correctly reading resistors is crucial for anyone working with electronic components and circuits. Having a basic knowledge of resistor color coding allows us to better understand how resistors function and interact within complicated electrical systems. By following these guidelines, you will be able to reliably read all types of resistor codes and make sure that your components are connected properly and functioning as expected.

Additional Resources


What is a 1K resistor?

A 1K resistor is an electronic component that has a resistance of one thousand ohms. It is commonly used in circuits to control the flow of electricity.

What is the color code for a 1K ohm resistor 4 band?

The color code for a 1K ohm resistor with four bands consists of two yellow stripes, two black stripes, and a white stripe. The yellow bands represent the first two digits (10), while the black bands represent the third and fourth digits (00). The white stripe represents the multiplier (kilo) and indicates that the number should be multiplied by one thousand.

What are the color codes of 1 kilo ohms resistance with 5% tolerance?

The color codes for a 1 kilo ohm resistor with 5% tolerance would be orange-black-red-gold. The orange stripe indicates the first two digits (10), the black stripe indicates the third digit (0), while red indicates multiplication by 1000. Finally, gold indicates that this particular resistor has a 5% tolerance.

What color is 10K on resistor?

On a standard 4 band resistor, 10K would be represented by an orange stripe followed by three black stripes—orange-black-black-black. Orange typically represents ten thousand and black indicates zero, which means that this particular resistor has a resistance of ten thousand ohms or 10K.

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