Wavelength to frequency converter
The calculator finds out wavelength based on frequency and vice versa. It accepts wave velocity as input, so you can use it for various kinds of waves (sound, light etc.).

Beta version

This online calculator is currently under heavy development. It may or it may NOT work correctly.
You CAN try to use it. You CAN even get the proper results.
However, please VERIFY all results on your own, as the level of completion of this item is NOT CONFIRMED.
Feel free to send any ideas and comments !

Length unit
Wave frequency
Wave frequencyHz
Frequency unit
Wave propagation speed
Wave velocitym/s
Velocity unit

Some facts

  • Electromagnetic waves are disturbances of electromagnetic field displaced in space.
  • Electromagnetic waves propagate at the speed of light.
  • One of the most basic parameters describing a wave (not only electromagnetic) is its frequency.
  • Since the frequency of the wave is directly related to its length, we can equally determine the wave by giving its length. The relationship between the length and the frequency of the electromagnetic wave is as follows:
    λ=cν\lambda = \frac{c}{\nu}

  • The waves classification based on the wavelength or frequency is conventional and has the practical meaning. This means that individual sources may deliver different bands.
  • The classification based on wavelength does not have to be strictly consistent with frequency based one. Often for convenience (i.e. to avoid fractional values), we round speed of light to 300,000 km/s when converting one classification to another.
  • The properties of electromagnetic waves are described by Maxwell's equations:
    ×E=Bt×B=μj+μεEtεE=ρB=0 \begin{aligned} & \nabla \times \vec{E} = -\frac{\partial \vec{B}} {\partial {t}} \\ & \nabla \times \vec{B} = \mu \vec{j} +\mu \varepsilon \frac{\partial \vec{E}} {\partial {t}} \\ & \varepsilon \nabla \cdot \vec{E} = \rho \\ & \nabla \cdot \vec{B} = 0 \end{aligned}

  • Historically, phenomena related to electricity and magnetism (and therefore the electric and magnetic field and their changes) were two separate branches of science. Maxwell's equations gave a coherent description joining both fields into one. Thanks to this, there is no need to speak separately about the magnetic and electric field anymore. We can simply use the term electromagnetic field instead.
  • Electric and magnetic fields are special cases of the electromagnetic field. Despite a coherent mathematical apparatus, which eliminates the need to distinguish between these two types of fields, sometimes the concepts of magnetic or electric field are used separately if it's handful.

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