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 Millennials and Savings How much could you save now and in the long-term? 5 Keys to Fiscal Fitness These basic moves, if done consistently, can help ensure that you are fiscally fit both now and in the future. Roth 401(k) vs. Traditional 401(k) This calculator compares employee contributions to a Roth 401(k) and a traditional 401(k).