Link popularity is an important factor to rank you site higher in Search Result. You can easily count how many site has linked your site. To calculate how many site has linked your site in Google search by simply typing site:http://www.yoursite.com and will show the search result and number of site that has placed your link. You can do the same thing in yahoo or MSN search engines.

There are a number of commands that are listed below which are handy. Also if you sign up for sitemaps then you can see a few other reports at Google.

I usually prefer seo tools from seochat;
http://www.seochat.com/seo-tools/link-popularity/

Thanks etechsupport. I will take a look at that link later on today

Thanks for reply