Room mode calculator

The axial standing-wave frequencies of a rectangular room — where bass builds up or cancels.

Calculated in this browser. Nothing is sent anywhere.

Axial + tangential + oblique modes up to order 4 per axis: f = (343/2)·√((nx/L)² + (ny/W)² + (nz/H)²). Schroeder uses RT60 = 0.5 s. Coincidences flag modes within 5 Hz.

How to use

  1. Enter the room's length, width, and height.
  2. Pick a frequency ceiling (default 300 Hz).
  3. Read the axial modes per dimension.

What it supports

Axial modes only: f = n·c/(2·d) with c = 343 m/s, for n up to the chosen ceiling, meters or feet input. Tangential and oblique modes are omitted — they matter less for bass placement. Coincident modes between dimensions are flagged.

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