Loan Amortization Calculator Use this calculator to calculate a loan amount based on your desired monthly payment or to calculate a monthly payment based on a loan amount. Retirement Income Planner Use this calculator to evaluate your retirement income plan. Social Security Calculator Estimate your Social Security benefits using the Social Security Administration's Quick Calculator. Regular IRA vs. Roth IRA - Annual Contribution Use this calculator to determine whether a regular IRA or a Roth IRA is right for you. Buying vs. Leasing - Auto Use this calculator to determine if you should lease or buy your next vehicle. Children's Education Savings Use this calculator to evaluate and determine if you need to make changes to your college savings plan. Years to Become a Millionaire This calculator computes the number of years it will take for an initial investment along with monthly contributions to accumulate to $1 million. Minimum IRA Distribution Use this calculator to determine the amount that the federal government requires you to withdraw annually from your IRA.