Loan Calculator with Amortization Schedule. Print-Friendly, Mobile-Friendly.Use our loan payoff calculator to see when your mortgage or other loan will be paid off in full. Use SmartAsset's free mortgage calculator to estimate your monthly mortgage payments, including PMI, homeowners insurance, taxes, interest and more. Calculate your monthly payment for fixed rate or adjustable rate loans. The formula for calculating your loan payment depends on whether you choose an amortizing or interestonly loan.