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 FIRE Retirement This short, informative article teaches the basics of the FIRE movement. Four Really Good Reasons to Invest There are four very good reasons to start investing. Do you know what they are? Understanding Marginal Income Tax Brackets An inside look at how marginal income tax brackets work.