In this post we will see how to convert a site to site collection.

1.  Save the existing site to site template (site actions-> site settings -> save site as template)
2. Download the created stp file from site template gallery of site collection and copy it to SharePoint server and we can delete it from site template gallery.
3. For adding this template to central administration site templates we need to execute the addtemplate stsadm command.
   “C:\Program Files\Common Files\Microsoft Shared\web server extensions\12\BIN\STSADM.exe” -o addtemplate  -filename “G:\Shared\mysite.stp” -title “mysite” -description “mysite”
4. Reset IIS

Now we can see the new site template under custom tab while creating site collection