This calculator requires a JavaScript capable browser

This JavaScript calculator will determine the Axial, Tangential and Oblique room modes of regular rectangular shaped rooms with uniform wall  construction. Axial room modes involve only a single room dimension, Tangential room modes involve two surfaces and Oblique modes involve three surfaces (across the corners). This is especially useful in finding the  optimum room shape for home theatre and listening rooms, studios, and practice rooms. When  the modal frequencies are plotted on a graph (still just a bit beyond the capability of  JavaScript) the distribution should be uniform, and there should not be a stacking of modal  frequencies. For all practical purposes, any modal frequencies above 300Hz will be swamped  by other room acoustic effects.

This Javascript calculator only looks at the first 9 integer values for each type of  mode (1-1-1, 2-2-2, 3-3-3, ...9-9-9)   and does not necessarily capture every possible mode.  It's primary purpose is to show the basic effects of inappropriate room dimension  selections and not act as a design tool. If you need a design tool, you may want to  investigate RPG Room Optimizer software

Room Dimensions

Room length
Metres

Room width
Metres

Room height
Metres