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 The Lowdown on Those Free Credit Scores What’s the deal with your yearly free credit report? Investments You’ve made investments your whole life. Work with us to help make the most of them. How Will Working Affect Social Security Benefits? Knowing the rules may help you decide when to start benefits.