Amplifier Voltage Gain Db
Calculator

Inputs

Voltage gain (dB)
20

Results

Voltage gain (dB)
20
Voltage gain ratio
10

Electrical results

Voltage gain (dB)20
Voltage gain ratio10

formula-map diagram

Voltage gain (dB)
20
Voltage gain ratio
10

Electrical relationship

Formula

Av(dB) = 20 × log10(Vout / Vin)

= 20

Note

This is a simplified model: it applies the textbook relationship to the numbers you entered and assumes ideal components, steady-state sinusoidal conditions, balanced loads and copper resistivity of 0.0172 Ω·mm²/m at 20 °C. It ignores component tolerances, temperature drift, skin effect, harmonics, inrush, transformer and battery losses, and it is not a substitute for the wiring code that applies where you are. Have any installation sized and verified by a licensed electrician or engineer.

More in Electrical engineering

See all →