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. What Do Your Taxes Pay For? Here's a breakdown of how the federal government spends your tax money. Tax Management Strategies Learn more about taxes, tax-favored investing, and tax strategies.