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 Building Your Legacy A four-step framework for building a personal legacy. Estimate Your RMD Help determine the required minimum distribution from an IRA or other qualified retirement plan. Do You Know the Whole Life Story? Whole life insurance can help to diversify a financial portfolio.