Tools/Room Mode Calculator

Room Mode Calculator

Enter your room dimensions to calculate axial resonant modes — the frequencies where sound builds up due to parallel walls. These are the most common cause of uneven bass response.

metres
metres
metres

Calculated using speed of sound at 20°C (343 m/s). Axial modes only — tangential and oblique modes exist but are lower amplitude.

Axial mode frequencies (20–300 Hz, log scale)
Length
Width
Height
Sub
Bass
Low-mid
20
40
60
80
100
120
160
200
300
FrequencyAxisHarmonic
38.1 Hz
Length
n=1
53.6 Hz
Width
n=1
61.3 Hz
Height
n=1
76.2 Hz
Length
n=2
107.2 Hz
Width
n=2
114.3 Hz
Length
n=3
122.5 Hz
Height
n=2
152.4 Hz
Length
n=4
160.8 Hz
Width
n=3
183.8 Hz
Height
n=3
190.6 Hz
Length
n=5
214.4 Hz
Width
n=4
245.0 Hz
Height
n=4
268.0 Hz
Width
n=5
Related Tools
EQ Frequency Chart →Note to Frequency →
Encyclopaedia
Room acoustics →Bass trapping →