The 5% tolerance resistor may have a maximum and minimum value of resistance. Last is the Gold band having tolerance value in 5% (0.05) from the table. 21įrom the table, the third orange band has value 1000. The first two digits of the band show the value of resistance 2 and 1 i.e. The Red band of the resistance value is 2 and the brown band of the resistance value is 1 from the table. So the final formula you can use to calculate resistance: Resistance = ((10x + y) z) (p/100) (Unit- Ohm)Ĭonsider, a resistor is having four different colour bands red, brown, orange, and gold respectively as shown in the below diagram.įirstly choose the value of colour from the table. (Says z)īand D: The fourth band (D) or last band shows the tolerance in percentage (%). (Says y)īand C: Third colour band (C) is the decimal multiplier and gives the number of zero after two digits. (Says x)īand B: The second colour band (B) represents the second digit of the numerical value of resistance.
Here, each band position and its colour has specific significance to calculate resistance value.īand A: A first colour band (A) represents the first digit of the numerical value of the resistance. BB ROY of Great Britain had a Very Good Wife. You can use this simple phrase to remember the sequence color band and its values. Note: I know, it is not easy to remember the value corresponding to each color band.