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Decibels (dB) Calculator

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Decibels are defined as ten times the log of a power ratio.  Decibels convert multiplication and division calculations into simple addition and subtraction operations. 

This calculator converts between decibels, voltage gain (or current), and power gain.  Just fill in one field and the calculator will convert the other two fields. 

Equations:

dB= 20log(V1/V2)= 10log(P1/P2)

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