Resistors are color coded for easy
reading. Imagine how many blind
technicians there would be
To determine the value of a given
resistor look for the gold or silver
tolorance band and rotate the
resistor as in the photo
above.(Tolerance band to the
right). Look at the 1st color band
and determine its color. This
maybe difficult on small or oddly
colored resistors. Now look at the
chart and match the "1st & 2nd
color band" color to the "Digit it
represents". Write this number
Now look at the 2nd color band
and match that color to the same
chart. Write this number next to
the 1st Digit.
The Last color band is the number
you will multiply the result by.
Match the 3rd color band with the
chart under multiplier. This is the
number you will mulitple the other
2 numbers by. Write it next to the
other 2 numbers with a
multiplication sign before it.
Example : 2 2 x 1,000.
To pull it all together now, simply
multiply the first 2 numbers (1st
number in the tens column and
2nd in the ones column) by the
First color is red which is 2
Second color is
which is 0
third color is yellow which is
Torerance is silver which is 10%
Resistor Color Code Chart
1st. & 2nd Color
3 X1,000 or 1K
4 X10,000 or 10K
5 X100,000 or 100K
6 X1,000,000 or 1M
Silver is divide by
8 Gold is divide by 10
Resistors are never the exact value that the color codes
indicate.Therefore manufacturers place a tolerance
color band on the resistor to tell you just how accurate
this resistor is made. It is simply a measurment of the
imperfections. Gold means the resistor is within 5% of
being dead-on accurate. Silver being within 10% and no
color band being within 20%. To determine the exact
range that the resistor may be, take the value of the
resistor and mutiply it by 5,10, 0r 20%. That is the
number that the resistor may go either way.
Example: A 1,000 Ohm resistor with a gold band
maybe any value between 950 to 1050 Ohms.
Example: A 22,000 Ohm resistor with a silver band
maybe any value between 19,800 and 24,200 Ohms.
Just a few common questions to help you out.
1) Which side of the resistor do I read from?
The Gold or Silver band is always set to the right,
Resistor Color Codes & Primer