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 Message Thank you! Oops! Related Content A Decision Not Made Is Still a Decision Investors who put off important investment decisions may face potential consequence to their future financial security. What’s Your Financial Planning Sign Discover your financial planning sign. Annuity Comparison This calculator compares a hypothetical fixed annuity with an account where the interest is taxed each year.