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. Share | Have A Question About This Topic? Name Email Address Message Thank you! Oops! Related Content Home Mortgage Deduction Use this calculator to assess the potential benefits of a home mortgage deduction. Six Most Overlooked Tax Deductions Six overlooked tax deductions to help manage your tax bill. Social Security Taxes Estimate how much of your Social Security benefit may be considered taxable.