Online calculation and formulas for calculating frequency and wavelengths
On this page you can calculate the wavelengths to a certain frequency, or the frequency to a wavelength. Wavelengths for electrical oscillations, light and sound can be calculated.

Tip: You will find a calculator for calculating frequency and period time here
The wavelength is the length of one period of an oscillation.
The wavelength depends on the frequency and the speed of propagation of the waves. The following table shows the speed of propagation of different waves in different media, as used in the calculator above.
Electrical oscillation in free spacev = 300000 km/sElectrical vibration in cablesv ≈ 240000 km/sLight wavesv = 300000 km/sSound waves in air +20°Cv = 343 m/sSound waves in waterv = 1470 m/s
The wavelength \(\displaystyle λ\) in meters is calculated by taking the propagation speed \(\displaystyle c\) divided by the frequency \(\displaystyle f\) teilt.
\(\displaystyle λ= \frac{c}{f}\)
This results in the following formula for calculating the frequency:
\(\displaystyle f= \frac{c}{λ}\)
\(\displaystyle λ\)
Wavelength in meters
\(\displaystyle f\)
Frequency in Hertz
\(\displaystyle c\)
Propagation speed in meters / second
