Mobile data is calculated in terms of kilobyte (KB), megabyte (MB), and gigabyte (GB). There are 1,024 KB in 1 MB and 1,024 MB in 1 GB. Most of the data tariffs are calculated, and/or charged, on a per MB basis.

Certain smartphones have in-built applications which provide an approximation of mobile data usage at regular intervals during your mobile data subscription period. There are also a good number of data monitoring applications readily available for download from the web.  You also have the possibility to review your data usage pattern in retrospect, by viewing your itemised bill which provides you with a detailed description of your data usage through the previous billing period. This can provide valuable insight into how you can control, or make better use of your mobile data package in the following months.  Whilst the various monitoring data applications provide an approximation of your mobile data consumption, the itemised bill provided by your service provider shows the true extent of your data usage.