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 What's My Potential Estate Tax? This calculator helps estimate your federal estate tax liability. The Pre-Retirement Checklist This checklist can give you a quick snapshot of how prepared you are. Managing the Risk of Outliving Your Money Steps to help you sustain and grow your retirement savings.