# Resistors are read starting from the line closest to the end of the resistor.  They will either have 4 bands or 5 bands.  If there are four bands then the first two are the value, the third is the multiplier, and the fourth is the precision.  If there are five bands then the first three are the value, the fourth is the multiplier, and the fifth is the precision.

 Color 1st Digit (A) 2nd Digit (B) Multiplier (C) Tolerance (D) Black 0 0 1 1% Brown 1 1 10 2% Red 2 2 100 3% Orange 3 3 1000 4% Yellow 4 4 10000 Green 5 5 100000 0.5% Blue 6 6 1000000 0.25% Violet 7 7 10000000 0.10% Gray 8 8 100000000 0.05% White 9 9 1000000000 Gold 0.1 5% Silver 0.01 10% No Color 20%

Resistors are read starting from the line closest to the end of the resistor.  They will either have 4 bands or 5 bands.  If there are four bands then the first two are the value, the third is the multiplier, and the fourth is the precision.  If there are five bands then the first three are the value, the fourth is the multiplier, and the fifth is the precision.

For example take the following resistor which has bands GreenBlueYellow, and Gold.  Since there are four bands the third band is the multiplier and the fourth band is the tolerance.  Looking at the chart below:

Green = 5 (tens place)

Blue = 6 (ones place)

Yellow = 10Kâ„¦

Gold = 5%

Understanding the value.  Put the 5 and 6 together for 56 then multiply by 10Kâ„¦ - 56*10Kâ„¦=560kâ„¦.

Understanding the tolerance.  The tolerance is +/-5% - 560kâ„¦*5%=28kâ„¦ which means the resistor may be 28kâ„¦ lower or higher than the stated value.    560kâ„¦-28kâ„¦=532kâ„¦.  560kâ„¦+28kâ„¦=588kâ„¦.  So the acceptable resistance of this resistor is between 532Kâ„¦ and 588Kâ„¦.

Above is an example of a 5 band resistor.  They are usually higher precision resistors.  In this case the band colors are redorangevioletblack, and brown.

Red = 2 (hundreds place)

Orange = 3 (tens place)

Violet = 7 (ones place)

Black = 1â„¦

Brown = 1%

237â„¦ 1%

Mnemonics for remembering color codes.  Mnemonics are the only way I can remember the color codes but times have changed in the 20+ years since my instructor told me the mnemonic for remembering resistor color codes and it would be too offensive for this site today.  However when I began researching modern mnemonics used to remember resistor color codes in schools I didn't find any of them nearly as effective.  So here is a good list of various mnemonics for remembering resistor color codes from Wikipedia.

https://en.wikipedia.org/wiki/List_of_electronic_color_code_mnemonics

## Standard Resistor Values for 5% Tolerance

 1 9.1 91 750 6.2k 51k 430k 3.9M 1.1 12 100 820 6.8k 56k 470k 4.3M 1.2 13 110 910 7.5k 62k 510k 4.7M 1.3 15 120 1.0k 8.2k 68k 560k 5.1M 1.5 16 130 1.1k 9.1k 75k 620k 5.6M 1.6 18 150 1.2k 10k 82k 680k 6.2M 1.8 20 160 1.3k 11k 91k 750k 6.8M 2 22 180 1.5k 12k 100k 820k 7.5M 2.2 24 200 1.6k 13k 110k 910k 8.2M 2.4 28 220 1.8k 15k 120k 1.0M 9.1M 2.7 30 240 2.0k 16k 130k 1.1M 10.0M 3 33 270 2.2k 18k 150k 1.2M 3.3 36 300 2.4k 20k 160k 1.3M 3.9 39 330 2.7k 22k 180k 1.5M 4.3 43 360 3.0k 24k 200k 1.6M 4.7 47 390 3.3k 27k 220k 1.8M 5.1 51 430 3.6k 30k 240k 2.0M 5.6 56 470 3.9k 33k 270k 2.4M 6.2 62 510 4.3k 36k 300k 2.7M 6.8 68 560 4.7k 39k 330k 3.0M 7.5 75 620 5.1k 43k 360k 3.3M 8.2 82 680 5.6k 47k 390k 3.6M

k = kilohms = 1,000 ohms

m = megohms = 1,000,000 ohms