1 megabyte = 8 388 608 bit
1 megabit = 1 048 576 bit
http://www.google.cz/#hl=cs&sclient=psy-ab&q=1MB%3 Dbit&oq=1MB%3Dbit&gs_l=hp.12..0i10i30l4.3000.3000. 11.4259.1.1.0.0.0.0.94.94.1.1.0...0.0...1c.1.7.psy -ab.DhQPaf2EmJQ&pbx=1&bav=on.2,or.r_qf.&bvm=bv.444 42042,d.Yms&fp=b17c0002bc33ad24&biw=1024&bih=612