MagicWorksHost provides Website Bandwidth Calculator, it calculates estimated monthly bandwidth usage of your website hosted on any server.You just need to enter Average page size of your web page, Average monthly visitors visit your website and Average page views done by each visitor to get an approx idea of which web hosting plan you should use in terms of bandwidth usage of your website.

for e.g if your page size is 2 MB, 15000 Visitors visits your website in a month and they view 4 pages of your website then you will need bandwidth of 120 GB per month.