This tool will will show you your page's PageRank as displayed by the GoogleBar.
Google PageRank is Google’s way of assessing the relative quality of a Web site or Web page on the Internet.
PageRank is measured on a scale of 0 to 10, the stronger the PageRank of a given Web page, the higher the corresponding score on the scale.
On occasion google might show different pageranks for pages with www. then for the ones without them, so make sure to check both.
More about pageRank