Mortgage Loan Calculator (PITI) Use this calculator to determine your monthly mortgage principal, interest, taxes and insurance payment (PITI) and amortization schedule. Amortizing Loan Calculator Enter your desired payment - and let us calculate your loan amount. Or, enter in the loan amount and we will calculate your monthly payment! Auto Loans Find out how much automobile you can buy based on your monthly payment, or find out your loan payment based on your purchase price! Roth vs. Traditional IRA Use this calculator to determine which IRA may be right for you. Checkbook Balancer Balance your checkbook with this quick and easy calculator.