How do I make a user profile field a link I've created a custom field for users on a site I'm working on that is for their website url. I want to make this field actually link to the website the users enter upon signing up.

Using Drupal 7, customized Bartik theme. The field is a standard text field.

I've tried doing a custom field template for that field, and I've tried editing the page-user.tpl.php file, neither worked.
If I'm understanding the question correctly it sounds like you need an additional module that will correctly validate/display the link in the user profile.  Overview of the steps needed:


Download the Link module:  
Add a new field to the user profile of type "Link" (found in confifuration --> people --> account settings --> manage fields)
Set any other config options you need