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Mihsaba›Wavelength and Frequency Calculator

Wavelength and Frequency Calculator

Solve wavelength, frequency or propagation speed from v=fλ with multiple units and a vacuum-light-speed preset.

How to use

Wave speed v, frequency f and wavelength λ are linked by v=fλ. The same relation works for different waves when the correct propagation speed is used.

  1. Choose the variable to solve for.
  2. Enter the other two values and units.
  3. For light in vacuum you can use 299,792,458 m/s as propagation speed.

How it is calculated

v=fλ; λ=v÷f; f=v÷λ

Example

Example: a 100 MHz radio wave in vacuum has wavelength about 2.9979 m.

Important notes

Sound speed is not universal, and light travels slower in materials than in vacuum. Use a propagation speed appropriate to the medium.

Frequently asked questions

Is this only a frequency converter?

No. It solves v, f or λ from the other two variables.

Is 299,792,458 m/s exact?

Yes. It is the defined exact SI value for the speed of light in vacuum.

Is this calculator free?

Yes. It is free to use and requires no account.