Wavelength Calculator

Select any two values to calculate the third:

Wavelength Calculator

A wavelength calculator is a tool that allows users to calculate the wavelength of a wave. Wavelength is the distance between two consecutive peaks or troughs of a wave. It is measured in meters (m).


The following are some of the key concepts that underlie wavelength calculators:

  • Wave: A wave is a disturbance that travels through space and time. Waves can be mechanical, such as sound waves or water waves, or electromagnetic, such as light waves or radio waves.
  • Wavelength: Wavelength is the distance between two consecutive peaks or troughs of a wave.
  • Frequency: Frequency is the number of waves that pass a given point in space in a given amount of time. It is measured in hertz (Hz).
  • Speed: Speed is the rate at which a wave travels. It is measured in meters per second (m/s).


The following formula is used to calculate the wavelength of a wave:

Wavelength = Speed / Frequency


λ = v / f


  • λ is the wavelength in meters (m)
  • v is the speed in meters per second (m/s)
  • f is the frequency in hertz (Hz)

For example, if a light wave has a frequency of 500 × 10¹² Hz and a speed of 3 × 10⁸ m/s, then its wavelength would be calculated as follows:

Wavelength = 3 × 10⁸ m/s / 500 × 10¹² Hz = 6 × 10⁻⁷ m

Benefits of using a wavelength calculator

There are several benefits to using a wavelength calculator, including:

  • Convenience: Wavelength calculators can save users a lot of time and effort, as they can perform complex calculations quickly and accurately.
  • Accuracy: Wavelength calculators are very accurate, as they use sophisticated mathematical algorithms to perform their calculations.
  • Flexibility: Wavelength calculators can be used to calculate the wavelength of any wave, regardless of its frequency or speed.
  • Versatility: Wavelength calculators can be used in a variety of fields, including physics, engineering, and astronomy.

Interesting facts about wavelength

  • The wavelength of a wave determines its color. Visible light has wavelengths ranging from 380 nm (violet) to 750 nm (red).
  • Ultraviolet light has wavelengths shorter than 380 nm, and infrared light has wavelengths longer than 750 nm.
  • Radio waves have wavelengths ranging from centimeters to kilometers.
  • Microwaves have wavelengths ranging from millimeters to centimeters.


  • David Halliday, Robert Resnick, and Jearl Walker: Fundamentals of Physics, 11th Edition
  • Paul A. Tipler and Gene Mosca: Physics for Scientists and Engineers, Volume 1: Mechanics, Oscillations and Waves, Thermodynamics, 7th Edition
  • Raymond A. Serway and John W. Jewett: Physics for Scientists and Engineers, Volume 1: Mechanics, 10th Edition


Wavelength calculators are a valuable tool for anyone who needs to calculate the wavelength of a wave. They are convenient, accurate, flexible, and versatile. Wavelength calculators are used in a variety of fields, including physics, engineering, and astronomy.

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