Voltage Gain in Decibels
An amplitude ratio maps to decibels with a factor of twenty.
Voltage Gain in Decibels
Signals · 2 inputs
How to use this calculator
- Enter output amplitude in V.
- Enter input amplitude in V.
- Select Calculate and keep the output unit with the answer.
Before you use the answer
Check the component connections and unit prefixes before copying a result into a circuit notebook. These tools describe ideal, introductory circuits. They do not replace datasheets, thermal checks, isolation requirements or qualified design work, and they are not intended for mains installation decisions.
Power-ratio decibels use ten. Relating voltage gain to power gain assumes appropriate impedances.
Does it save my inputs?
No calculation history is stored by this website. The calculator works locally in your browser. See the privacy policy for hosting and contact details.
Why might a result be approximate?
Measurement uncertainty, ideal-model assumptions and floating-point rounding can all matter. Displaying more digits does not improve the original measurement.
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Power Gain in Decibels
Decibels express power ratios on a logarithmic scale.
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