Resistor Color Code Calculator

How to calculate the resistance

As shown on top of, a carbon-composition electrical device will have four to six bands. Resistor 5-band electrical device is additional precise compared to a 4-band kind attributable to the inclusion of a 3rd significant figure. A 6-band electrical device is sort of a 5-band electrical device, however, includes a temperature constant band (the sixth band).

How to calculate the resistance

Mnemonics were created to simply study the sequence of the colors. the foremost standard memo technical is “Big Boys Race Our Young Girls But Violet Generally Wins” wherever the primary letter of every word corresponds to the primary letter of the color.

If the color is found on the third band for a 4-band kind or the fourth band for a 5-band and 6-band kind, then it is a number.

Calculating resistance for a 4-band resistor

Resistance = AB x C ± D%

Where,

Let’s take the example of a 4-Band resistor with the colors given in the above image (brown, blue, red and gold).

So according to the formula the resistance will be: 10 * 1000  = 10000 Ohms or 10K Ohms with 5% tolerance.

Color Code Exceptions

5th Band Resistor with the 4th Band of Gold or Silver

Five band resistors with the fourth band of silver or gold type Associate in Nursing exception, and are used on specific or older resistors. the primary 2 bands represent the numerous digits, the third band could be a multiplication issue, the fourth band is for tolerance and therefore the fifth band is for the temperature constant (ppm/K).

Single Black Band or Zero-Ohm Resistor

A single black band on an electrical device is termed a zero-ohm electrical device. Basically, it’s a wire link wont to connect traces on a computer circuit board (PCB) that are packaged within the same physical package format as an electrical device. This packaging permits the zero-ohm electrical device to be placed on the care mistreatment identical instrumentation usually wont to place alternative resistors.