Federal Income Tax Use this calculator to estimate your income tax liability along with average and marginal tax rates. 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 Contributing to an IRA? Determine if you are eligible to contribute to a traditional or Roth IRA. Women on the Rise Explore the growing influence women wield over the economy with this handy infographic. Tax Freedom Day Assess how many days you'll work to pay your federal tax liability.