About the Wavelength Calculator
Wavelength from wave speed and frequency (λ = v/f) — works for sound, light and radio waves.
Also known as: lambda calculator, wavelength formula, wave length, radio wavelength.
How to use this calculator
- Enter solve for.
- The result updates instantly as you type — press Calculate (or Enter) at any time.
- Review the breakdown shown under the main result.
- Use Copy result or Share to save the answer or send a link with your inputs.
Formula
λ = v / f
- λ
- = wavelength in metres
- v
- = wave speed (343 m/s in air, 3×10⁸ m/s for light)
- f
- = frequency in hertz
Worked example
Using the values pre-filled in the calculator above:
- Solve for: Wavelength
- Wave speed = 343 m/s
- Frequency = 50 Hz
the calculator returns:
- Wavelength: 6.86 m
- Wave speed: 343 m/s
- Frequency: 50 Hz