Converting designs made in Adobe Photoshop (.psd) to an actual HTML web page is not a file conversion, but rather a work flow. You cannot do it directly, but an experienced web designer can "convert" the design saved in a .psd graphic file and make or code a web site that looks exactly like original layout in psd file.
Ideal way is to use Adobe Photoshop (psd editor) and Adobe Dreamweaver (html editor) from Adobe Creative Cloud subscription service.
In this way a .psd file is used as a preview to how the final web page should look like. It is popular way of making web pages, because the web designer can use the .psd for image assets used on the actual web page. You can find plenty of various tutorials that deal with creating html from psd all over the internet.
You can also try to use www.psd2html.com service and order conversion of your graphic designs in html and css formats.
