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 Put It in a Letter A letter of instruction provides additional and more personal information regarding your estate. Making a Charitable Contribution There are benefits and limitations when you decide to donate stock. Saving for Retirement This calculator can help you estimate how much you may need to save for retirement.