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 You May Need to Make Estimated Tax Payments If… Have income that isn’t subject to tax withholding? Or insufficient withholdings? You may have to pay estimated taxes. Disability Income This calculator estimates your chances of becoming disabled and your potential need for disability insurance. To Catch a Thief Having your identity stolen may result in financial loss plus the cost of trying to restore your good name.