The mortgage payoff calculator helps you find out. Free mortgage payoff calculator to evaluate options to pay off a mortgage earlier, such as extra payments, bi-weekly payments, or paying back altogether.Use our extra payment calculator to see the potential impact an additional payment will have on your long-term finances. Use the extra payment calculator below to help determine how advantageous it is to pay a little extra each month toward your mortgage. Use this additional payment calculator to determine the payment or loan amount for different payment frequencies. This Bi-Weekly Mortgage Calculator makes the math easy. It will figure your interest savings and payoff period for a variety of payment scenarios. It will figure your interest savings and payoff period for a variety of payment scenarios. Making extra payments on your mortgage can help you pay off your home loan more quickly, saving money on interest in the long run. Calculate a mortgage payoff amount earlier to better understand what your loan payments balance.