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. Share | Related Content Estate Management 101 A will may be only one of the documents you need—and one factor to consider—when it comes to managing your estate Four Steps to Valuing an Estate Determining the value of your estate, or for someone who has passed away, can be a complex undertaking. What Is My Life Expectancy? Estimate how many years you may need retirement assets or how long to provide income to a surviving spouse or children.