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 What Is a Roth 401(k)? Roth 401(k) plans combine features of traditional 401(k) plans with those of a Roth IRA. Not Your Parents’ Finances From paychecks to housing costs, millennials today are confronting very different financial challenges, opportunities and... The Long Run: Women and Retirement For women, retirement strategy is a long race. It’s helpful to know the route.