Toolbar PageRank vs. Actual PageRank

Google Toolbar allows you to see an approximate PR value for any indexed page. However, these PR values you see on the toolbar are not the actual PageRank values that Google takes into consideration while ranking web pages. The Google toolbar is segmented into 10 equal linear values from 0 to 10. The actual PR is, however, calculated on a logarithmic scale and is estimated to be between log base 5 and log base 10. But often it’s the toolbar PR value that most people talk about and unnecessarily agonize over.