Our mortgage calculator can help you figure out the monthly payments of your home mortgage loan, based on the property's sale price, the length of the loan, your downpayment, and the loan's interest rate. This calculator factors in PMI (Private Mortgage Insurance) if your down payment comes to less than 20% of the loan total. The calculator also gives a very rough estimate as to what you can expect as far as property taxes go. For an actual property tax estimate ask your realtor about local tax rates.