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. Share | Have A Question About This Topic? Name Email Address Question Thank you! Oops! Related Content Traditional vs. Roth IRA One or the other? Perhaps both traditional and Roth IRAs can play a part in your retirement plans. A Taxing Story: Capital Gains and Losses Understanding how capital gains are taxed may help you refine your investment strategies. What Is My Current Cash Flow? Assess whether you are running “in the black” or “in the red” each month.