HECM Reverse Mortgage Calculators How much can you get from a reverse mortgage? Find out using the calculators linked below. HECM Calculator How much can you get from a HECM reverse mortgage? Our quick and easy-to-use reverse mortgage calculator can tell you. No contact information is required. Go to Calculator HECM Purchase Calculator Yes, you can buy a house with a HECM reverse mortgage! Find out how much down payment you’ll need with our easy-to-use purchase calculator. Go to Calculator Principal Limit Calculator Use this simple calculator to quickly and easily calculate a HECM reverse mortgage principal limit (PL) based on age, home value, and interest rate. Go to Calculator Click here to download your own FREE Excel-based reverse mortgage calculator.