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I am in need of a Windows program (preferably as many versions as possible; XP, Vista, 7, etc.).
The program is basically able to convert file size/transfer time/transfer speed when I manually give it the information. For example, if I put in a transfer time of 27 minutes and a file size of 1,5GB, it must be able to tell me the transfer speed. Or if I put in a transfer speed of 600kbps and a file size of 350MB it must be able to tell me the transfer time.
I need it to work without a connection to the Internet. I don't care much about how the program looks, but I demand it to be extremely easy to use, even so that the first try using it is simple.