Sabine Reverb Time Estimator
Estimate reverberation time using room volume and equivalent absorption.
Your inputs
Calculation results
Formula & assumptions
RT60 ≈ 0.161 × volume/(surface area × mean absorption); diffuse-field approximation.
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 Sabine Reverb Time Estimator
Estimate reverberation time using room volume and equivalent absorption.
- Enter room volume, surface area, mean absorption coefficient 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
Room volume: 100 cubic meters Surface area: 140 square meters Mean absorption coefficient: 0.2 fraction Estimated RT60 · seconds: 0.575 Equivalent absorption · square meters: 28
Questions & answers
What does Sabine Reverb Time Estimator calculate?
Estimate reverberation time using room volume and equivalent absorption.
Which units should I enter?
Room volume uses cubic meters. Surface area uses square meters. Mean absorption coefficient uses fraction. Convert values to these units before calculating.
Which formula does it use?
RT60 ≈ 0.161 × volume/(surface area × mean absorption); diffuse-field approximation.
What does the included example show?
Room volume: 100 cubic meters; Surface area: 140 square meters; Mean absorption coefficient: 0.2 fraction. Result: Estimated RT60 · seconds = 0.575; Equivalent absorption · square meters = 28.
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.
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