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? Address Thank you! Oops! Related Contents Tax Freedom Day Assess how many days you'll work to pay your federal tax liability. Understanding Marginal Income Tax Brackets An inside look at how marginal income tax brackets work. Home Mortgage Deduction Use this calculator to assess the potential benefits of a home mortgage deduction.