The previous simulated calculated values are based on averages. Mortgage calculators let you perform a wide variety of mortgage simulations and calculations. Select advanced and enter different values and experiment with different principal amounts, interest rates, payments, taxes, insurance, or income… to see what you can afford, or how it effects the calculated outcomes. PMI (Private Mortgage Insurance) and HOA fees not included. If your down payment is below 20% PMI (Private Mortgage Insurance – Approx 1%) can be added within the calculation.