How to Change a Post to a Page in WordPress (and Why You’d Want To)

WordPress makes it incredibly easy to set your website up the way you want it. Sometimes, though, it is not as easy to make changes to get the desired effect. One example is if you want to change a post to a page, or a page to a post. By default, WordPress doesn’t let you change the post type when a post (or page) is already published.

Source: How to Change a Post to a Page in WordPress (and Why You’d Want To)