What's My Potential Estate Tax? This calculator helps estimate your federal estate tax liability. 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 Question Thank you! Oops! Related Content Grantor Retained Annuity Trusts (GRATs) Explaining Grantor Retained Annuity Trusts (GRATs) and their benefit to estate strategy. How Compound Interest Works Use this calculator to better see the potential impact of compound interest on an asset. How Much Home Can I Afford? With a few simple inputs you can estimate how much of a mortgage you may be able to obtain.