# Wavelength Calculator-How to calculate wavelength?

The wavelength of a radio wave is the length of one full wave cycle from start to finish. It is calculated by dividing the velocity of the radio wave (speed of light, c =299 792 458 m/s) by frequency (f). The frequency is the number of cycles generated by the radio wave in one second. Mathematically, Wavelength λ = c/f. In modern networks, the frequencies are generally expressed in GigaHertz (GHz) or MegaHertz (MHz).

## Wavelength Calculator

Mobile networks employ radio waves for all communication between the base station and the cell phone. One of the most precious resources of a mobile operator is the frequency spectrum which defines what carrier frequencies they may use to roll out their services. For example, if a country wants to use a frequency band ranging from 3.4GHz to 3.8GHz to launch certain 5G services, the carrier frequencies will be in any selected bands within this range. The length of the wave cycle, wavelength for a signal being transmitted at these frequencies will be very short.

As shown by the red lines in the diagram below, the wavelength of a radio wave is the length of one full wave cycle from start to finish. It is the distance between the start and end of the wave cycle and is expressed in metres. The endpoint of a full-wave cycle is the starting point of another wave cycle. When you read a theoretical document, you may come across ‘peaks’ and ‘troughs’ when explaining wavelength, which can be confusing. You don’t have to worry about the peaks and troughs of a wave when measuring wavelength. You can pick any two random points on a wave that have the same position on the wave. For example, look at the green line below, which starts at a random point A and ends at a random point B. For mathematical calculations, you don’t need to look at any diagrams; all you need is the frequency in Hertz and the speed of light, which is 299 792 458 meters per second.

The formula for calculating the wavelength of a radio wave:

Wavelength = λ = c/f;

where f is the frequency in Hertz and c = 299792458 m/s.