For webmaster you should try this tool, it called google pagerank checker and google pagerank prediction. You can check your website’s pagerank .

you can try it for free here

http://www.iwebtool.com/pagerank_checker

If you want to prediction your pagerank in the future you can try this tool

http://www.iwebtool.com/pagerank_prediction

I try this tool a few months ago, predict my website pagerank and its not too bad,
tool showing my pagerank prediction is 4, but after google update my website pagerank , my site only with pagerank 3. So its not too bad, you can try it and its free.