Estimate room reverberation time, also called RT60, using room dimensions and average absorption. This calculator shows room volume, surface area, equivalent absorption area, RT60 result, room category, and calculation steps.
Room volume:
The calculator multiplies room length, width, and height to estimate the total room volume.
Surface area:
The calculator estimates the total surface area of the walls, ceiling, and floor.
Absorption area:
The total surface area is multiplied by the average absorption coefficient to estimate equivalent absorption area.
A reverberation time calculator helps estimate how live, echoey, dry, or controlled a room may sound. It can be useful for studios, offices, classrooms, home theaters, churches, music rooms, restaurants, and meeting spaces.
This calculator gives a simplified estimate. Professional acoustic design may require frequency-band absorption data, furniture details, audience absorption, air absorption, and measured room response.
The calculator uses a simplified Sabine-style formula:
RT60 = 0.049 × V ÷ A when using feet
RT60 = 0.161 × V ÷ A when using meters
Reverberation time, often called RT60, is the time it takes for sound in a room to decay by 60 dB after the sound source stops.
For speech rooms, a shorter reverberation time is usually better. Many classrooms, offices, and meeting rooms work best around roughly 0.4 to 0.8 seconds, depending on size and use.
Add absorption such as acoustic panels, carpet, curtains, upholstered furniture, ceiling treatment, or other sound-absorbing materials.
No. Reverberation is the buildup and decay of many reflections. Echo is usually a distinct delayed reflection that can be heard separately.