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Visual Resistance Calculator

This calculator requires the use of Javascript enabled and capable browsers. This calculator is designed to display a typical carbon film resistor. You may click on any of the drop down box values and the color band display will change to the appropriate bands. The value of the resistor will be displayed below it. Or, you may enter a value and the bands will change. See our Resistor Color Code Calculator. There is also a resistor information table below the calculator.

Visual Resistance Calculator

Band Color
Band #1
Band #2
Band #3
Multiplier Value
For Band 3
Band #4
Value Tolerance
Black   0 1 1
Brown 1 1 1 10
Red 2 2 2 100
Orange 3 3 3 1,000
Yellow 4 4 4 10,000
Green 5 5 5 100,000
Blue 6 6 6 1,000,000
Violet 7 7   10,000,000
Gray 8 8   100,000,000
White 9 9   1,000,000,000
None 20%
Silver 10%
Gold 5%
Version 2.4.2

The resistor color code is a long standing standard in both the electronics and electrical industries, indicating the value of resistance of a resistor. Resistance is measured in ohms and there is a foundation for it called Ohm's Law. (Want to know about Ohm's Law? If so, please click here or click here!) Each color band represents a number and the order of the color band will represent a number value. The first 2 color bands indicate a number. The 3rd color band indicates the multiplier or in other words the number of zeros. The fourth band indicates the tolerance of the resistor +/- 20%, 10% or 5%. In most cases, there are 4 color bands. However, certain precision resistors have 5 bands or have the values written on them, refining the tolerance value even more. There is no standard (TANS) however, for the 5th band. From one manufacturing company to another, the 5th band may indicate 2%, 1%, 1/2% or even closer, according to their own standards. Color bands are usually found on resistors that have a wattage value of 1/8 to 2 watts; though it is rare, there are some 5 watt resistors that are banded. There are also some capacitors that are color coded. See our Capacitor Color Code Calculator.

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