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 What Is a Roth 401(k)? Roth 401(k) plans combine features of traditional 401(k) plans with those of a Roth IRA. What Is the Dividend Yield? This calculator helps determine your pre-tax and after-tax dividend yield on a particular stock. Forecast This short video helps explain why markets can be as unpredictable as the weather.