How can I find how many inbound links I have?

In reality there is no real way to calculate the exact number of inbound links in. The best way to find inbound links to your website is to use either Google or AllTheWeb / FAST. With Google, it is possible to search for inbound links by using the search query "link:www.xyz.com", this will search for all links to the site www.xyz.com. On AllTheWeb, you can check for inbound links to a site by using "link.all:www.xyz.com".