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Wavelength Calculator - Frequency to Wavelength

Free wavelength calculator. Convert between frequency and wavelength for light, sound, and radio waves using λ = v/f formula.

Calculate wavelength from frequency

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Wavelength Calculator

Calculate wavelength from frequency and wave speed. Works for electromagnetic waves (light, radio) and mechanical waves (sound).

λ = v / f

Where λ is wavelength, v is wave speed (299,792,458 m/s for light in vacuum, 343 m/s for sound in air), and f is frequency in Hz.

What is the speed of light?

In vacuum: 299,792,458 m/s. In air it's nearly the same. In water it's about 225,000,000 m/s.

What frequencies are visible light?

Visible light: 400-790 THz (wavelengths 380-700 nm). Below is infrared, above is ultraviolet.

Frequency Converter

Convert frequency units

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