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 What Is My Life Expectancy? Estimate how many years you may need retirement assets or how long to provide income to a surviving spouse or children. Retirement Accounts When You Change Your Job This video discusses issues related to your retirement accounts when you move on from your job. What's My Potential Estate Tax? This calculator helps estimate your federal estate tax liability.