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 Message Thank you! Oops! Related Content Five Most Overlooked Tax Deductions Five overlooked tax deductions to help manage your tax bill. Are Alternative Investments Right for You? With alternative investments, it’s critical to sort through the complexity. Estimating the Cost of College This worksheet can help you estimate the costs of a four-year college program.