The mortgage payoff calculator helps you find out. Use this free Georgia mortgage calculator to estimate your monthly mortgage payments and annual amortization.This mortgage payoff calculator helps evaluate how adding extra payments or bi-weekly payments can save on interest and shorten mortgage term. Use SmartAsset's free mortgage calculator to estimate your monthly mortgage payments, including PMI, homeowners insurance, taxes, interest and more. Use WalletHub's credit card payoff calculator to calculate how long it will take to pay off a balance and how much it will cost.