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 Required Reading: The Economic Report of the President The Economic Report of the President can help identify the forces driving — or dragging — the economy. Five Most Overlooked Tax Deductions Five overlooked tax deductions to help manage your tax bill. Red Flags for Tax Auditors Here are six flags that may make your tax return prime for an IRS audit.