The mortgage payoff calculator helps you find out. Enter your normal mortgage information at the top of this calculator.You can optionally add your other homeownership expenses in the middle section. NerdWallet's early mortgage payoff calculator figures out how much more to pay. 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 this mortgage calculator to calculate estimated monthly mortgage payments and rate options. Use SmartAsset's free California mortgage loan calculator to determine your monthly payments, including PMI, homeowners insurance, taxes, interest and more. Mortgage Payoff Calculator. Paying Off a Loan Over Time. For help determining what interest rate you might pay, check out today's mortgage rates.