I know facebook has nofollow attributes. My webmaster tools showing facebook link also. Will it be consider while calculating page rank?
no they will not considered as the juice supplying backlink.but yes of course they are also links but not of any good to give you a good Google PR. it can give you some visitors nothing else. thanks
they will NOT Be considered for a simple reason that google bot can not read anything from facebook except the user's profile link.
You already said it your self. It has nofollow attributes which make it not to pass the link juice to the link.
Many people fail to realize that Google and Facebook are pretty much the two largest players on the web. So if I were Google I would be keeping track of anything that is on Facebook so that I could offer this information as well. That being said, a link from Facebook may say nofollow but I would suspect that Google still reads through the data. Facebook Fan Pages can rank really high on Google so I believe having one does help you a bit if it is linked to your website. No proof though.
Facebook will give you the visitors and traffic and will not help you in page rank as all the links in facebook are no follow links