1k Ohm resistor Color code |1000 ohm of 3 4 5 & 6 bands

1k ohm carbon resistor is a very popular resistor in Physics laboratory. It has wide uses in different practical circuits. Carbon resistors are identified by the colors of bands on their surface. Therefore, we need to read the color code to calculate the resistance value of such resistors. In this tutorial page, we are going to learn the color code reading of 1k ohm resistor with 3, 4, 5 and 6 bands. Before this, we need to know the coding for each color. Here is the color code chart for carbon resistors.

3 bands 1k Ohm resistor color code

3 Bands 1k Ohm resistor
3 Bands 1k Ohm resistor

1k ohm = 1000 ohm.

For a three-band 1k ohm resistor, the first two digits are 1 and 0 respectively and the multiplier is 100 as there are two zeros after the first two digits. Since, there is no fourth band, the tolerance is 20% which is coded as M. Hence, the color coding of 1k ohm resistor with 3 bands is 102M with the colors of bands as Brown, Black and Red.

If you don’t know how are the codes 1, 0, 2, M, etc. used, please go through this post: Resistor color code chart

Band numberColorCode
1st bandBrown1
2nd bandBlack0
3rd bandRed2
No tolerance
band
M
Color coding of 3-band 1k ohm resistor

Thus, the color code, 102M = \small \color{Red}1000 \Omega \pm 20%.

1k Ohm resistor color code with 4 bands

4 Bands 1k Ohm resistor
4 Bands 1k Ohm resistor

For a Four-band 1k ohm resistor, the color codes of first three bands will remain same as those of a three-bands 1000 ohm resistor. But there will be a fourth band which is tolerance band. If the tolerance is 10% then the color of fourth band will be Silver which has the code “K“. So, the color code of 1k resistor with 4 bands will be as 102K with colors of the bands are Brown, Black, Red and Silver.

Band numberColorCode
1st bandBrown1
2nd bandBlack0
3rd bandRed2
4th BandSilver (if tolerance is 10%)K
Color code for 4-band 1k resistor

Thus, the color code, 102K = \small \color{Red}1000 \Omega \pm 10%.

Please note that the tolerance can be different for other 1k resistors. If tolerance is 5%, then fourth color will be Golden color which has the code “J” instead of “K“. However, the colors of first three bands will be same for all 3 bands and 4 bands 1 kilo-ohm resistors.

5 bands 1k Ohm resistor color code

5 Bands 1k Ohm resistor
5 Bands 1k Ohm resistor

For a 5 band 1k ohm resistor, the first three digits will be as 1, 0 and 0 respectively and the multiplier is 10 as there is only one zero after the three digits. If the tolerance is 10%, the fifth band of the resistor will have Silver color. Then the color coding of 5 bands 1k Ohm resistor is 1001K and colors of the bands are Brown, Black, Black, Brown and Silver.

Band numberColorCode
1st bandBrown1
2nd bandBlack0
3rd bandBlack0
4th BandBrown1
5th BandSilver (if tolerance is 10%)K
Color coding for 5-band 1k ohm resistor

Thus, the color code, 1001K = \small \color{Red}1000 \Omega \pm 10%.

1000 Ohm resistor color code with 6 bands

6 Bands 1k Ohm resistor
6 Bands 1k Ohm resistor

If there is a sixth band, then it will implies its temperature coefficient. If the temperature coefficient of the 1k ohm resistor is 0.5, then the color of sixth band will be green which is coded by the digit “5”. Then the color code of 1k ohm resistor with 6 bands will be as 1001K4 with the colors of the bands as Brown, Black, Black, Brown, Silver and Green.

Band numberColorCode
1st bandBrown1
2nd bandBlack0
3rd bandBlack0
4th BandBrown1
5th BandSilver (if tolerance is 10%)K
6th BandGreen
(if temperature coefficient is 0.5 )
5
Color coding for 6-band 1k ohm resistor

Thus, the color code, 1001K5 = \small \color{Red}1000 \Omega \pm 20% with temperature coefficient 0.5.

Note: Tolerance and Temperature coefficient can be of different values for different 1 kilo-ohm resistors. We need to use the coding accordingly. For example: if the tolerance is 5%, then the fifth band will be of golden color and corresponding code will be J instead of K. Similarly, if the temperature coefficient is 25, then the color of sixth band will be Yellow which has the code as 4.

In this way one can identify the 1k ohm resistor by reading its color code. There can be different codes depending upon the number on bands the resistor have. However, the values of the resistance will always be 1000 ohm. If you still have any confusion in this topic you can ask me in the comment section.

Thank you!

Related post:

  1. Carbon resistor color coding rules
  2. 100 Ohm resistor color code
  3. 10k ohm resistor color code

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