convert excel FV table for my website or financial calculator

I currently have an excel spreadsheet that i created that contains a table to calculate future values. i would like to add this table to my website allowing my clients to do "what if analysis" and enter different values for "certain variables" only. i am assuming i can't put an excel file online so will have to program something in java or c/c++ or something like this i am attaching the excel table for your review