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 A Primer on Irrevocable Life Insurance Trusts Irrevocable life insurance trusts can be important tools that may accomplish a number of estate objectives. Filing Final Tax Returns for the Deceased The federal government requires deceased individuals to file a final income tax return. Tax Freedom Day Assess how many days you'll work to pay your federal tax liability.