AUDIO & VIDEO PLANNING · VERSION 1.0.0

Amplitude to Decibels Calculator

Compare positive amplitudes as a gain in decibels.

Instant calculationCompare five scenariosJSON + CSV exports

Your inputs

Calculation results

Formula & assumptions

Gain = 20 log₁₀(measured/reference).

Values use the specified units. Calculations use floating-point arithmetic. Check input measurements and formula assumptions before applying the result.

Compare your scenarios

Save up to five results to compare changes side by side. Scenarios stay in this tab until you clear or reload it.

Using Amplitude to Decibels Calculator

Compare positive amplitudes as a gain in decibels.

Enter measured amplitude, reference amplitude using the units printed under each field.
Choose Calculate, or enable live updates. Review the result labels and formula assumptions.
Save scenarios to compare up to five variations, then copy the report or download JSON or CSV.

Example

Measured amplitude: 0.5 linear units
Reference amplitude: 1 linear units
Gain · decibels: -6.0205999
Amplitude ratio: 0.5

Questions & answers

What does Amplitude to Decibels Calculator calculate?

Compare positive amplitudes as a gain in decibels.

Which units should I enter?

Measured amplitude uses linear units. Reference amplitude uses linear units. Convert values to these units before calculating.

Which formula does it use?

Gain = 20 log₁₀(measured/reference).

What does the included example show?

Measured amplitude: 0.5 linear units; Reference amplitude: 1 linear units. Result: Gain · decibels = -6.0205999; Amplitude ratio = 0.5.

Can I compare different settings?

Yes. Save a scenario, change the inputs and save another result. Up to five scenarios are compared in this tab; they disappear when you reload or leave.

Can I export the calculation?

Copy the JSON report or download JSON and CSV with inputs, result labels and numeric values. Processing uses local JavaScript; no calculation request is sent to our server. Displayed values use up to 10 significant digits; exports retain JavaScript numeric precision.