Xfer Calculator is a bandwidth/transfer time/transfer size calculator.

It is very useful when you need to :

  • calculate how much time it takes to transfer a certain amount of data with a certain bandwidth
  • calculate how much data you can transfer with a certain bandwidth in a certain time window
  • calculate how much bandwith you have if you have transfered a certain amount of data in a certain amout of time


  • Calculate bandwidth/file transfer time or transfer size
  • Take the protocol overheads into account
  • A lot of predefined common bandwidths availables
  • Automatic selection of best unit size
  • Fully customizable ! You can enter your own set of units, predefined rates and overheads
  • Saves the latest state on close