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 Jane Bond: Infiltrating the Market Agent Jane Bond is on the case, cracking the code on bonds. Retirement Questions That Have Nothing to Do With Money Things to consider before retirement. IRA Withdrawals that Escape the 10% Tax Penalty The list of IRA withdrawals that may be taken without incurring a 10% early penalty has grown.