Home / Room calculator
How many panels do I need?
Enter your room and we’ll estimate how long sound lingers now (the reverberation time, RT60) and how many panels bring it down to a comfortable level.
Your estimate
- Room volume
- 48,000 ft³
- Echo now (RT60)
- 5.35 s
- Target
- 1.00 s
- Panels
- 253 × 24 × 48 in, 2 in thick
- Echo after
- 1.00 s
- Wall coverage
- 51% of wall area
- Estimated cost
- $20,429.75 in basic polyester, with 15% volume savings
This uses the Sabine formula, RT60 = 0.161 V / A, with typical absorption for your finishes. It is a planning estimate, not a measurement. How RT60 works.