MortCalc 1.0 - MortCalc is not an Amortization program, but rather a tool similar to those lenders use to qualify people for mortgages. Please remember that factors other than just income are use to qualify borrowers. Enter your monthly income before taxes and Newton will tell you how much you can afford for monthly housing, how large of a mortgage you can afford (both with or without downpayment). You can choose a 15 or 30 year mortgage, and set the interest rate and percent down payment. If you enter an incredibly high monthly income, you'll get a reminder to pay the $552 shareware fee, otherwise it's whatever where.