RT60 Reverb Decay for a Gymnasium
Calculate the reverb decay time in a large gymnasium with hard reflective surfaces.
How to use this tool
- Enter room volume, total surface area and avg absorption coeff in the fields above.
- Results update instantly as you type — or click Calculate.
- Read your rt60 decay time and the full breakdown beneath it.
Gymnasiums are notorious for very long reverb times due to hard walls and floors — this calculator quantifies the RT60 and helps plan acoustic treatment.
Frequently asked questions
- What is RT60?
- RT60 is the time (in seconds) for a sound to decay by 60 dB after the source stops. A concert hall typically has RT60 of 1.5–2.5 s; a recording studio aims for under 0.5 s.
- What is Sabine's formula?
- RT60 = 0.161 × V / A, where V is room volume (m³) and A = surface area × average absorption coefficient.