The displayed value is not the actual value Google uses so it is only a rough guide
heGoogle Toolbar's PageRank feature displays a visited page's PageRank as a whole number between 0 and 10. The most popular websites have a PageRank of 10. The least have a PageRank of 0. Google has not disclosed the precise method for determining a Toolbar PageRank value. The displayed value is not the actual value Google uses so it is only a rough guide. 'Toolbar' PageRank is different than Google PageRank because the PageRank displayed in the toolbar is not 100% reflective of the way Google judges the value of a website.