You can use a multitude of different websites that will give you the PR of your website. Just do a search on Google for "Page Rank Checker" and it'll bring back a ton of sites.
i spoke to many people that do SEO for a long time... they always advised me to install the "google bar" on the browser and use the page rank check! they say is the best way to measure pagerank
PR is a Google term/classification/rating, therefore there is NO better place to check for your PR then in Google. Also keep in mind that PR updates happen every three months. So checking anytime in between will be really a waste of time.
Use google toolbar. This is best tool to measure PR. Secondly you can also use Google Free Monitor Tool to measure keyword ranking also.
Use this useful tool :- http://www.seochat.com/seo-tools/pagerank-lookup/ hope it will serve your purpose.