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 Buying Auto Insurance For Teen Drivers Tips on insuring your teen driver. Understanding Marginal Income Tax Brackets An inside look at how marginal income tax brackets work. A Look at Systematic Withdrawals This calculator may help you estimate how long funds may last given regular withdrawals.