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Relation between dB loss and percentage loss

  1. Jul 23, 2011 #1
    I want to know generally what the relation between dB loss and percentage loss is. If I want to know what percentage of a signals strength is lost knowing what its dB loss is, how would I accomplish that.

  2. jcsd
  3. Jul 23, 2011 #2


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    For power loss it would be :

    [tex]100 \left( 1 - 10^{\frac{dB}{10}} \right) \,\%[/tex]

    And for voltage loss it would be :

    [tex]100 \left( 1 - 10^{\frac{dB}{20}} \right) \,\%[/tex]

    Where dB here would be negative for signal loss.
    Last edited: Jul 23, 2011
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