Capital Gains Tax Estimator Use this calculator to estimate your capital gains tax. You are viewing this website at a small screen resolution which doesn't support calculators. Click here to view this calculator. Have A Question About This Topic? Name Email Address Question Thank you! Oops! Related Content 4 Elements of an Estate Strategy Learn about the importance of having an estate strategy in this helpful and informative video. What's My Potential Estate Tax? This calculator helps estimate your federal estate tax liability. Contributing to an IRA? Determine if you are eligible to contribute to a traditional or Roth IRA.