You can check your Google PR in many ways: Use the PRChecker.Info Service. Install Google Toolbar. Install Search Status.
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Hello friend, Generally you can use google toolbar's pagerank,it is very easy to know the PR of any website but sometimes it does not display actual value.so you can use google pagerank checker.
The problem with Google toolbar, SearchStatus, and SEO Quake is that they do not tell you if the Google PageRank is fake or valid. Try http://www.rankchecker.com. It's fast and it tells you the PageRank and whether it's valid or fake. It also shows you the Alexa rank, backlinks on Google, Yahoo!, and Bing, plus domain age and registration details.
Google toolbar is the best option to check PR . If you using Google Chrome then you can use "web rank" add on to check PR.
SEO Status is lightweight. It will check the Google Pagerank (PR) & Alexa rank for every page. Using this will increase your Alexa.