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 Comparing Investments This calculator compares the net gain of a taxable investment versus a tax-favored one. Money that Buys Good Health is Never Ill Spent It's important to make sure your retirement strategy anticipates health-care expenses. Five Most Overlooked Tax Deductions Five overlooked tax deductions to help manage your tax bill.