The two calculators below convert input/output **power** and **voltage** to a **Power Gain** in dB (deciBel).

## Linear **Power to dB** Gain

**Formula**

**G _{dB} = 10*log_{10}(P_{out}/P_{in})**

## Linear **Voltage to dB Gain**

**Formula**

**G _{dB} = 20*log_{10}(V_{out}/V_{in})**

This assumes the input and output impedance is the same.