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 Systematic Withdrawals in Retirement Taking regular, periodic withdrawals during retirement can be quite problematic. Taxable vs. Tax-Deferred Savings Use this calculator to compare the future value of investments with different tax consequences. Social Security: Five Facts You Need to Know Here are five facts about Social Security that are important to keep in mind.