Calculate the acoustic treatment your room needs

Four free calculators for treating small rooms — home studios, podcast booths, home theatres and offices. Enter your room once and get panel count, reverberation time and room modes from a single model. We don't sell panels, so the numbers aren't bent toward buying anything.

Why another acoustics site?

Most "how many panels do I need?" calculators are run by companies that sell panels, and most reverberation tools are single-purpose pages from the early 2000s. We built one coherent toolkit that uses a single room model, shows its formulas openly on the methodology page, and cites every absorption figure in the material database.

Per-material deep dives

Sourced octave-band data and honest, myth-busting notes for the materials people ask about most — each pulled straight from the absorption database:

• Acoustic foam absorption coefficient — NRC by thickness and foam type — and why it barely touches bass.
• Mineral wool absorption coefficient — Thickness and an air gap beat density — the panel-builder’s material.
• Carpet absorption coefficient — Tames echo, not bass — and why it is not soundproofing.
• Curtains absorption coefficient — Fullness and an air gap are the levers — “soundproof” curtains do not block noise.
• Gypsum board (drywall) absorption coefficient — The one surface in the room that absorbs bass rather than treble — and NRC 0.05 hides it.
• Cork absorption coefficient — Rated the same as bare brick — sold as treatment, measured as a hard surface.
• Concrete absorption coefficient — Four different materials share the name — and painting the block costs you most of it.