Convert My Calculators

I have created several "calculators" in excel that I wish to post on a web site for people to use. I need the excel calculators converted into some thing that can be posted on my web site. The calculators use tables, If-then functions, Pmt functions, and basic rates of return data to help clarify concepts for people. I have ayoung man who has built the basic web site for me, but he can't do the conversion of the calculators. I have uploaded two of the excel calculators. There is data to be viewed and/or input on the cover sheet, which references data and tables on other sheets.