Free on-line bandwidth calculator

This website provides free web tool to compute the bandwidth used while downloading with given speed over time, the speed needed to download a file in given time or the size of a file that can be transferred with a certain speed, e.g. overnight.

The online utility is easy to use, does not require downloading anything and works on most devices, operating systems and browsers. For the information on the units used, and where to find the data, head to the How to use page.