Conversão bits e bytes

Fonte:http://www.google.com.br/imgres?hl=pt-BR&biw=960&bih=584&tbm=isch&tbnid=gPWMTpPha0_1FM:&imgrefurl=http://dicdicasinfo.blogspot.com/2012/04/unidades-de-grandezas-em-bits-bytes-e.html&docid=FgO1mXai6Ps8wM&imgurl=https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEi7SMZ0sO6lrA-JwKobmyi9EMV-CxIImmI2OArd7RX0WLoELsvMAADgrsoSU8PIv2x0xJ0qJzcXBRiURM9Dj2wgHQpGJg3A0siuFKxQGt7CEL3dgkNN96ZnyjEYcUJgd3nqvev1BMWuoqA/s1600/Bits%25252BBytes.bmp&w=890&h=247&ei=VfxiUKOLNoHN0AHyzIDgAw&zoom=1&iact=hc&vpx=4&vpy=302&dur=423&hovh=117&hovw=427&tx=225&ty=49&sig=106006137292896852753&page=1&tbnh=43&tbnw=153&start=0&ndsp=15&ved=1t:429,r:4,s:0,i:80