how to find resistance color code

 


Resistance Color Code Finder

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how to find resistance color code

To find the resistance color code, you need to look at the colored bands on the resistor.

Here are the steps to determine the resistance value from the color code:

  1. Identify the tolerance band, which is usually the last band on the resistor.

  2. Count the number of colored bands on the resistor. Most resistors have four bands, but some have five or six.

  3. Identify the first three colored bands. These represent the significant digits of the resistance value.

  4. Use a color chart or table to determine the value of each digit. Each color corresponds to a specific number, as follows:

    • Black = 0
    • Brown = 1
    • Red = 2
    • Orange = 3
    • Yellow = 4
    • Green = 5
    • Blue = 6
    • Violet = 7
    • Gray = 8
    • White = 9

  5. Combine the values of the first three colored bands to determine the resistance value in ohms. For example, if the first three bands are brown, black, and red, the resistance value would be 1 0 2, which means 10 × 10² or 1,000 ohms.

  6. Determine the multiplier band, which represents the power of 10 to multiply the resistance value by. This band is usually the fourth band, but it may be the fifth or sixth band for resistors with more than four bands.

  7. Use the color chart or table again to determine the multiplier value for the multiplier band. This value represents the power of 10, as follows:

    • Black = x1
    • Brown = x10
    • Red = x100
    • Orange = x1,000
    • Yellow = x10,000
    • Green = x100,000
    • Blue = x1,000,000
    • Violet = x10,000,000
    • Gray = x100,000,000
    • White = x1,000,000,000

  8. Multiply the resistance value by the multiplier value to get the final resistance value in ohms.

  9. Finally, use the tolerance band to determine the tolerance of the resistor. The tolerance band represents the maximum deviation in percentage from the actual resistance value. For example, if the tolerance band is gold, the tolerance is ±5%. If the tolerance band is silver, the tolerance is ±10%.

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