Can I change the assumptions?

Yes. Replace the example defaults with values from the current game, project, product, drawing, data sheet or market source.

No. It is an estimate produced by the displayed formulas and entered assumptions. Real results may differ because of factors described in the limitations section.

Should an important result be verified?

Yes. Verify important decisions with current source data, official documentation, manufacturer information or a qualified professional.

Acoustic Room Calculator

Calculate axial room modes, room volume, Schroeder frequency and Sabine reverberation time from room dimensions and absorption assumptions. Enter your own values and review every assumption shown with the result.

Room LengthRoom WidthRoom HeightTotal Absorption

Estimated RT60

0.392 s

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The primary result is displayed first, followed by supporting values that make the estimate easier to verify.

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How to Use This Calculator

Enter each requested value using the displayed unit. Replace the example defaults with source-specific values and review all assumptions.

Formula & Methodology

The calculator applies the displayed formulas directly to the entered values. Supporting outputs expose important intermediate calculations.

Worked example

A 20 × 15 × 8 ft room has a volume of 2,400 ft³. With 300 sabins of absorption, Sabine RT60 is about 0.392 seconds.

Sabine's equation assumes a reasonably diffuse sound field and averaged absorption. Real rooms also depend on frequency, surface placement, openings, speaker position, listener position and modal damping.

Planning tool only. Critical studios, theaters and noise-control projects should be measured and designed by a qualified acoustician.

Related Guides

How to Calculate Room Acoustics: RT60, Absorption, and Treatment
Learn how to calculate RT60 reverberation time using the Sabine and Eyring formulas, how absorption coefficients work, and how to determine how much acoustic treatment a room needs.

Frequently Asked Questions

What does the Acoustic Room Calculator calculate?: Calculate axial room modes, room volume, Schroeder frequency and Sabine reverberation time from room dimensions and absorption assumptions.
Can I change the assumptions?: Yes. Replace the example defaults with values from the current game, project, product, drawing, data sheet or market source.
Is the result exact?: No. It is an estimate produced by the displayed formulas and entered assumptions. Real results may differ because of factors described in the limitations section.
Should an important result be verified?: Yes. Verify important decisions with current source data, official documentation, manufacturer information or a qualified professional.

Last updated 7/22/2026