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dB Gain Calculator

dB Gain Calculator is a simple online tool to help you determine the ratio of output to input values in an electrical circuit on a logarithmic scale. This ratio is represented by decibels (dB).

This tool allows you to calculate voltage gain in dB, current gain in dB and power gain in dB. To find voltage gain this calculator uses the following equation:

dB = 20lg(V_out / V_in),

where: dB – decibel gain in dB, V_in – input voltage, V_out – output voltage. The same equation can be used to calculate current gain.

To find power gain this calculator uses the following equation:

dB = 10lg(P_out / P_in),

where: dB – decibel gain in dB, P_in – input power, P_out – output power.

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