Traveling Wave Relationship
The relationship of the wave frequency, wavelength and propagation velocity.
Doppler Effect in sound
Calculation of frequency and wavelength change for a moving source
Symbol frequencies table
This online calculator builds symbol frequency table for a given message
Wordpress plugin
With Planetcalc plugin for Wordpress you can easily insert any planetcalc calculator in your wordpress-based site or blog pages.
The waves and the wind. Calculation of wave characteristics
Calculation of wave characteristics
Text fitness (version 3)
This online calculator calculates measure known as fitness score, of how given text is similar to a typical English text. It uses logarithms of probabilities with normalization to calculate fitness score. The reference frequencies are calculated from Leipzig Corpora Collection and can be downloaded from The less value you get, the better.
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