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Wave Speed Calculator
Find wave speed from frequency and wavelength.
Frequency times wavelength
Every wave obeys the same simple relationship: its speed is its frequency multiplied by its wavelength. It ties together how often a wave cycles and how long each cycle is.
A 256 Hz sound wave with a 1.34 m wavelength travels about 343 m/s — the speed of sound in air. The same formula governs light, radio, and ripples on a pond.
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The calculation runs in your browser, so nothing you enter is uploaded.
Frequently Asked Questions
What is the formula?
Wave speed equals frequency times wavelength. It applies to sound, light, and water waves alike.
What units?
Hertz and metres give speed in metres per second.
Does it work for light?
Yes. For light in a vacuum, frequency times wavelength always equals the speed of light.
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