No offence, but I feel like these sorts of threads shouldn't exist. The answer to this simplistic question is obtainable with a simple search much faster than it takes to write the thread and wait for someone to respond. JFGI.
Hi, If you want to know your site pr then you must go for quick result option. go for google tool means install google toolbar then you can see directly your site pr and also back link , similar page , snapshot of your site. This is simplest method and very quick method and it's my experience. Trust me. Try it!!!! Best Luck