an acoustic tool

Room Reverberation Calculator

Ever wondered why some rooms feel loud and echoey while others feel easy to talk in? It comes down to reverberation time, and the industry measure for it is called RT60. Used by acoustic engineers and architects worldwide, RT60 tells you exactly how long sound bounces around your room before it fades away. Enter your room dimensions and surface materials below to calculate your RT60 score and find out whether your space has an echo problem.

Room dimensions

10m

Length

Width

Ceiling height

Surface materials

Floor

Ceiling

Walls

Furnishings

1.8 seconds RT60

Time for sound to decay by 60dB — calculated using the Sabine formula

Room volume

240 m³

Total absorption

13.4 m²

Your room

0s — dead 0.5s 1.0s 1.5s 2.0s+

Industry target ranges

Home / living room

0.3 – 0.5s

Restaurant / cafe

0.6 – 0.8s

Open-plan office

0.4 – 0.6s

This calculator uses the Sabine formula (RT60 = 0.161 × V ÷ A), a widely used acoustic engineering equation. NRC values for surface materials are based on published industry data. Results are indicative and intended as a guide only — for precise acoustic design, we recommend consulting a qualified acoustic engineer.

So your RT60 is too high - now what?

The most effective way to reduce reverberation is to introduce soft, sound-absorbing surfaces into your space; particularly at ceiling height, where sound travels most freely before bouncing back down.

That's exactly what acoustic pendants do. Unlike wall panels or floor treatments, pendants hang directly in the path of sound, absorbing it before it has the chance to reflect and build up. The fabric construction soaks up sound energy rather than bouncing it back into the room, bringing your RT60 down to a comfortable, natural level.

The difference isn't just measurable. It's something you feel immediately. Conversations become easier. The space feels calmer. And unlike traditional acoustic treatment, pendants do all of this while looking beautiful.

Our acoustic pendants are designed and made to order; so whether you need a single statement piece or a full ceiling installation across a large commercial space, we'll work with you to get it right.