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 How Big is Money? Learn a little about worldwide currency in this fun infographic Inflation and Your Portfolio Even low inflation rates can pose a threat to investment returns. Potential Income from an IRA Estimate your monthly and annual income from various IRA types.