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 How Big is Money? Learn a little about worldwide currency in this fun infographic Does Your Portfolio Fit Your Retirement Lifestyle? Lifestyle considerations in creating your retirement portfolio. Potential Income from an IRA Estimate your monthly and annual income from various IRA types.