Frequency to Wavelength Calculator

This frequency to wavelength calculator helps you determine the wavelength of a waveform based on the frequency. It assumes that the wave is traveling at the speed of light which is the case for most wireless signals. The entry unit of frequency can be modified, the output wavelength is calculated in meters.

Enter the Frequency to Calculate the Wavelength


  • Wavelength
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         λ = C/f



λ (Lambda) = Wavelength in meters

c = Speed of Light (299,792,458 m/s)

f = Frequency

If you want to calculate the Frequency from Wavelength - Click here to use the Wavelength to Frequency Calculator.

Understanding Frequency and Wavelength

What is Frequency?

The frequency of a waveform is the number of times a complete waveform is repeated in a fixed time period. The unit of frequency is Hz which corresponds to the number of waveforms that repeat in 1 second. So if a wave repeats 5 times in one second its frequency would be 5 Hz.

What is Wavelength?

The wavelength of a wave is the distance between two adjacent peaks or troughs of adjacent cycles. It is a characteristic of both traveling waves and standing waves. It is denoted by lambda (λ) and it can be represented in units of distance like mm, cm, meters etc. Wavelength is inversely proportional to frequency.

Relationship between frequency and wavelength

In the case of traveling waves, the frequency of a wave is correlated to the wavelength of the wave and the speed at which the wave is traveling. If a wave is moving faster, the number of complete wave cycles that will complete in 1 second is higher than when compared to a slower wave. So the speed at which a wave is moving is a very important factor when determining its frequency.

An important point to note is that two waves with different wavelengths can have the same frequency. So lets assume, that Wave 1 has a wavelength of 1 cm and Wave 2 has a wavelength of 2 cm. To have the same frequency, Wave 2 will need to travel at a speed that is 2 times Wave 1.

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