Question 1

How do you calculate resistor color code?

Accepted Answer

Hold the resistor with the gold or silver band to the right and read the color codes from the left to the right. Select the color codes from the bands on the resistor. Read the colors from left to right. The resistance value based on the color code provided is now displayed.

Question 2

What is a Resistor Colour code?

Accepted Answer

A Resistor colour code or Resistor Color Code is a system for displaying information by using different colors. The earliest examples of color codes in use are for long distance communication by use of flags, as in semaphore communication.

Question 3

How do I know if I have a 100K resistor?

Accepted Answer

100k ohm resistor color code- 4 band  
1) Brown, Black, Yellow, Gold. 
2) And tolerance considered as ==> 5% of 100K ==>5000Ω  
3) Other methods: Remove the resistor from PCB then test it with a DMM in resistance mode and note down its value. It needs to be separated from pcb so as to avoid the equivalent parallel resistance from resistors in the circuit.

Question 4

What does a 1k resistor look like?

Accepted Answer

1k ohm resistor color code are - Brown - black - red  
1 k ohm Resistors with 5 band are 1% tolerance resistors. First three bands determine the value of the resistor.

Question 5

What is resistor value?

Accepted Answer

A resistor is a device that opposes the flow of electrical current. The bigger the value of a resistor the more it opposes the current flow. The value of a resistor is given in ohms and is often referred to as its 'resistance'.

Question 6

How is a 3.9 K resistor color code?

Accepted Answer

3.9K Ohm 0.5W Metal Film Resistor (MFR) with ±1% Tolerance. 3.9K Ohm Resistor Color Code: Orange, White, Black, Brown, Brown.

Question 7

What is a 100K resistor?

Accepted Answer

Actual value of 100k Ohm resistor is calculated as:  1st band= Brown= 1 (1st digit) 2nd band= Black= 0 (2nd digit) 3rd band= Yellow= 4(multiplier)= 10000. 4th band= Gold= ±5% (tolerance) Therefore, 10×1000000±5% ==> 1000000Ω ==> 100KΩ

Question 8

What is resistor explain?

Accepted Answer

A passive electrical component with two terminals that are used for either limiting or regulating the flow of electric current in electrical circuits. The main purpose of the resistor is to reduce the current flow and to lower the voltage in any particular portion of the circuit.

Question 9

What is 2.2k ohm Resistor color code for 4-band?

Accepted Answer

The color code of 2.2 k resistor is Red-Red-Red-Gold. From the above resistor color code table, you will find that Red stands for 2 and Red for 2. The third band is Red, so it means a multiplier value of 2 (100). And the 4th band is Gold, which means the tolerance is 5%. Thus the value of 2k2 resistor is 56 · 102 = 56 · 100 = 5600 Ω. Thus The resistance value lies therefore between 5320 and 5880 Ω (5560 ± 5%).

Question 10

How do I know if I have a 10k ohm resistor?

Accepted Answer

You could read its band color and get it with the online color code calculator. For example, the 4 band 10k resistor color code is brown-black-orange-silver/gold. And the tolerance of the silver band is 10% or gold for 5% tolerance. And if it is a 5 band resistor, the 10k resistor color code will be brown-black-black-red. Meanwhile the tolerance band is separated from the other 4 bands color code. Its color could be one of several depending on the resistors tolerance.

Question 11

How can I calculate a 6-band resistor value?

Accepted Answer

Fill in the blanks using the first five colors. Resistors with six bands are essentially five-band resistors with an extra ring showing the temperature coefficient or dependability.

Question 12

I have a resistor with only 3 bands, How to know its value?

Accepted Answer

3-band resistors have a tolerance of 20% and are widely employed by amateurs or in situations where the resistance value is not crucial. Brown, black, and gold are the colors for a 3 band 1R0 (1 ) resistor. Between 1.2 and 0.8 will be the resistance value. 
Therefore, you don't need to enter the 4th band while using our online resistor color code calculator. Because there is not a tolerance ring for 20% resistors. However, the 3 band resistor will be calculated through the 4 bands color code rule (digit, digit, multiplier).Therefore, the 4 band resitor color code calculator is 3 band resistor color code calculator too.

For example:
3 band resistor color code of a 10K resistor with 20% tolerance is Brown, black, orange.
Resistor color code 3 band for 220 ohm resistors with 20% tolerance is Red, red, brown.

Question 13

Which is the first band for the colored-resistors?

Accepted Answer

There are a few guidelines to follow: 
1.) The color bands on certain resistors are packed together and/or near to one end. Hold the resistor to the left of the tightly clustered bars and read the resistor from left to right. 
2.) The process for reading 5% and 10% resistors is straightforward: hold the resistor with the silver or gold band to the right and read the resistance from left to right. 
3.) The first band can't be silver or gold, so if you have one, you'll know where to start right away. As fundamental resistor values vary from 0.1 Ohm to 10 Mohms, the third color for 4-band resistors will be blue (106) or less, while the fourth color for 5-band resistors will be green (105) or less.

Question 14

How do you read a 3-band resistor?

Accepted Answer

For a 3-band resistor color codes, the first two bands always denote the first two digits of the resistance value while the third band represents the multiplier. In the example we have, the bands are brown, black and brown. The first band is the brown band closest to the edge.

Color	Significant Digits	Multiplier	Tolerance	Temp. Coefficient
Black	0	1 ( $10^0$ )	-	250 ppm/K
Brown	1	10 ( $10^1$ )	$\pm 1\%$ (F)	100 ppm/K
Red	2	100 ( $10^2$ )	$\pm 2\%$ (G)	50 ppm/K
Orange	3	1k ( $10^3$ )	$\pm 0.05\%$ (W)	15 ppm/K
Yellow	4	10k ( $10^4$ )	$\pm 0.02\%$ (P)	25 ppm/K
Green	5	100k ( $10^5$ )	$\pm 0.5\%$ (D)	20 ppm/K
Blue	6	1M ( $10^6$ )	$\pm 0.25\%$ (C)	10 ppm/K
Violet	7	10M ( $10^7$ )	$\pm 0.1\%$ (B)	5 ppm/K
Grey	8	100M ( $10^8$ )	$\pm 0.05\%$ (L)	1 ppm/K
White	9	1G ( $10^9$ )	-	-
Gold	-	0.1 ( $10^{-1}$ )	$\pm 5\%$ (J)	-
Silver	-	0.01 ( $10^{-2}$ )	$\pm 10\%$ (K)	-

Resistance	4-Band Code (5% Tolerance)	5-Band Code (1% Tolerance)
1 $\Omega$	Brown - Black - Gold - Gold	Brown - Black - Black - Silver - Brown
10 $\Omega$	Brown - Black - Black - Gold	Brown - Black - Black - Gold - Brown
100 $\Omega$	Brown - Black - Brown - Gold	Brown - Black - Black - Black - Brown
1 k $\Omega$	Brown - Black - Red - Gold	Brown - Black - Black - Brown - Brown
10 k $\Omega$	Brown - Black - Orange - Gold	Brown - Black - Black - Red - Brown
100 k $\Omega$	Brown - Black - Yellow - Gold	Brown - Black - Black - Orange - Brown
1 M $\Omega$	Brown - Black - Green - Gold	Brown - Black - Black - Yellow - Brown
10 M $\Omega$	Brown - Black - Blue - Gold	Brown - Black - Black - Green - Brown

Resistor Color Code Calculator

Calculator

Introduction

How to Use the Resistor Color Code Calculator

How to Use the Online Calculator

Understanding Resistor Color Codes

How to Read the Bands

FAQ

Resistor Color Code Chart

Band Configurations Explained

4-Band Resistors

5-Band Resistors

6-Band Resistors

Calculation Examples

1. 10k Ohm Resistor (4-Band)

2. 100 Ohm Resistor (4-Band)

Quick Reference: Common Resistor Color Codes

Standard Resistor Series (E-Series)