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? Name Email Address Message Thank you! Oops! Related Content The Rule of 72 Do you know how long it may take for your investments to double in value? The Rule of 72 is a quick way to figure it out. Value vs. Growth Investing Among stock-market investors there’s long been a debate between those who favor value and those who favor growth. 5 Smart Investing Principles Principles that can help create a portfolio designed to pursue investment goals.