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Instant result
Enter the data and press the button to do the calculation.
Online Calculator
Amplifier gain calculator
Enter input and output values to calculate linear and logarithmic gain.
Information
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Local processing
The values are processed directly in your browser.
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Free
No registration, external API or subscription required.
Frequently asked questions
How is the voltage gain calculated?
Av = Vout/Vin.
How is it expressed in dB?
For voltage, use 20 log₁₀|Av|.
And for power?
Use 10 log₁₀(Pout/Pin).
Can it show losses?
Yes, a ratio below 1 produces a negative dB value.