Here is a link to a helpful tool for those uploading video to YouTube, Vimeo and other websites.  Takes the guesswork out of bitrate settings when encoding.  🙂

http://www.3ivx.com/support/calculator/index.html

p.s.  Note to self:  When exporting in Avid, use the kiloBits/sec value in the calculator, for audio and video bitrate.

Avid Storage Calculator – link
http://www.avid.com/US/resources/avid-storage-calculator