Contributing to an IRA? Determine if you are eligible to contribute to a traditional or Roth IRA. You are viewing this website at a small screen resolution which doesn't support calculators. Click here to view this calculator. Share | Have A Question About This Topic? Address Thank you! Oops! Related Contents Inflation and Your Portfolio Even low inflation rates can pose a threat to investment returns. How Stocks Work Understanding how a stock works is key to understanding your investments. Keys to Investing for Retirement There are some key concepts to understand when investing for retirement.