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 Question Thank you! Oops! Related Content The Fed and How It Got That Way Here is a quick history of the Federal Reserve and an overview of what it does. Tax Efficiency in Retirement What role would taxes play in your investment decisions? When Should You Take Social Security Monthly Social Security payments differ substantially depending on when you start receiving benefits.