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 Message Thank you! Oops! Related Content The Business Cycle Understanding the economy's cycles can help put current business conditions in better perspective. Bull and Bear Go To Market Learn about the difference between bulls and bears—markets, that is! Roth IRA for Kids Learn about the benefits and requirements of opening a Roth IRA for kids.