Wavelength Calculator

Calculate the wavelength of sound at a given frequency, or determine the frequency for a given wavelength. This relationship is fundamental to understanding room modes, boundary effects, and acoustic treatment design.

Hz

Common Frequencies Reference

Frequency Wavelength Notes
20 Hz17.15 m (56.3 ft)Lowest audible frequency
40 Hz8.58 m (28.1 ft)Low E string on bass guitar
80 Hz4.29 m (14.1 ft)Typical subwoofer crossover
100 Hz3.43 m (11.3 ft)Deep bass range
200 Hz1.72 m (5.6 ft)Upper bass / lower mids
500 Hz68.6 cm (2.3 ft)Midrange frequencies
1000 Hz34.3 cm (1.1 ft)Reference frequency
5000 Hz6.9 cm (2.7 in)Speech clarity range
10000 Hz3.4 cm (1.3 in)High frequency treble
20000 Hz1.7 cm (0.7 in)Upper hearing limit

Formula

λ = c / f

Where:

  • λ (lambda) = wavelength (meters)
  • c = speed of sound (m/s)
  • f = frequency (Hz)

The speed of sound in air varies with temperature:

c = 331.3 + (0.606 × T)

Where T is temperature in °C. At 20°C, c ≈ 343 m/s (1125 ft/s).