Enter a wave's frequency and wavelength to calculate its wave speed using the formula v = f × λ. You can also solve for frequency or wavelength by selecting a different calculation mode. Results include the computed wave property plus a visual breakdown of the input values. Also try the Series Resistor (R1) — Audio Attenuator (L-Pad).
Wave Speed (v)
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Frequency
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Wavelength
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Wave Period (T)
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Wave speed is the rate at which a wave propagates through a medium — in other words, the distance the wave travels per unit of time. It is typically measured in meters per second (m/s) and depends on both the properties of the wave and the medium it travels through. See also our Frequency Converter.
Use the formula v = f × λ, where v is wave speed in m/s, f is frequency in Hz, and λ (lambda) is wavelength in meters. For example, a wave with a frequency of 440 Hz and a wavelength of 0.7757 m has a speed of approximately 341.3 m/s.
Electromagnetic waves — including light, radio waves, X-rays, and microwaves — travel at approximately 299,792,458 m/s (roughly 3 × 10⁸ m/s) in a vacuum. This is commonly referred to as the speed of light, denoted by the letter c.
The SI unit of wave speed is meters per second (m/s). Frequency is measured in Hertz (Hz), and wavelength is measured in meters (m), making the product f × λ naturally yield m/s. You might also find our find Primary Result with Sound Absorption Coefficient Calculator useful.
Yes. Use the 'Calculate' dropdown to switch between solving for wave speed (v), frequency (f), or wavelength (λ). Simply provide the two known quantities and the calculator will solve for the third using the same wave equation rearranged accordingly.
The wave period (T) is the time it takes for one complete wave cycle to pass a fixed point, measured in seconds. It is the reciprocal of frequency: T = 1/f. Wave speed can also be expressed as v = λ / T, which is equivalent to v = f × λ.
Yes. The formula v = f × λ applies universally to all wave types including sound waves, light waves, water waves, seismic waves, and electromagnetic waves. However, the actual speed will vary depending on the medium and wave type — for example, sound travels at ~343 m/s in air but much faster in water or steel.
Rearranging the formula: λ = v / f = 350 / 140 = 2.5 meters. You can verify this using the calculator by selecting 'Wavelength' as the calculation mode and entering v = 350 m/s and f = 140 Hz.