Hi I am suresh mogudala software developer, I have seen and analyzed the requirement about Loan calculator for the registered Users, here I am going user Sql Server for storing user details and loan details(Example Personnel, Car, House Business loan etc..) for particular user,C# Programming saving and calculating details, Java script client side validations and CSS for better viewing. Process is User can register and log in to the site select load name and amount interest rates will be displayed depends on amount monthly payment will be displayed (Ex: Loan name: Car,Amount :1lac Interest Per Month:12.5% Duration(in months):12 Monthly mount is :8908 displayed to the user and these details saved if required. I will create database using normalization concept.