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 Success in Their Own Words Why freedom, not money, is the mark of financial success and other surprising insights from professional representatives. Social Security Benefits: How Much Will I Receive Calculating your potential Social Security benefit is a three-step process. What Does That Mean? IDK Financial acronyms you should know.