Calculating the final file size . . .help

[musca]

Newbie question:

I have ripped one DVD using Smart Ripper and I am plannig to compress it using dvd2avi and TPMGEnc.
The original DVD files are 4.7 Gb and the movie is 1h34min long.
How do I calculate the final .mpg size ?

Thanks a lot,

[Kwulabear]

Use this: http://www.vcdhelp.com/calc.htm

[BOB-C]

get hold a decent bit rate calculator enter in cd size and amount eg 1cd or 2cd and tinker with bitrate figures