The aim of the present work is to demonstrate the expediency of using information technologies on the study of Brownian motion. The importance of using such software as VirtualDub, Tracker and Google Sheets for the study of Brownian motion has been substantiated. This made it possible to determine the values that cannot be measured directly (the displacement of the Brownian particle, the size of the Brownian particle and the Avogadro number). The advantage of this method is that all software are free.