This is by far the best way to check the Page Rank or PR of a webpage, blog or website.  With PageRankChecker, you can check Page Rank for many URLs, check Page Rank of an entire site using XML sitemap, or check page rank of all the links from a particular URL. It also has a very simple interface as you can see below.

Feature list:

• Check PR of a single URL
• Check PR of multiple URLs simultaneously
• Check PR of all outgoing links from a URL.
• Check PR of all URLs in an XML sitemap

Check out PageRankChecker