Here's a little something I hacked together a little while ago. I thought some of you might find it useful. It almost qualifies for WEB 2.0 ... But not really. :) http://timspage.kicks-ass.net/Misc/TransferCalculator/ I didn't actually write it from scratch, I used the SG Bits/Bytes converter as a base. http://www.speedguide.net/conversion.php