This Mortgage Loan Calculator shows the monthly payments, interest, principle, PMI and Amortization. You have the option to set the mortgage loan calculator to show by month or by year. Then you can review your balance and see when you payoff date will be.
Banks will typically want to lend you money based on what you can afford. A typically payment to gross income ratio might be 35%. Using this as a guide, you can see just how much of house you can afford.