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. Have A Question About This Topic? Name Email Address Message Thank you! Oops! Related Content How Compound Interest Works Use this calculator to better see the potential impact of compound interest on an asset. Annuity Comparison This calculator compares a hypothetical fixed annuity with an account where the interest is taxed each year. A Taxing Story: Capital Gains and Losses Understanding how capital gains are taxed may help you refine your investment strategies.