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 Historical Inflation This calculator shows how inflation over the years has impacted purchasing power. The Wild West of Data Theft Learn about cyber liability insurance in this entertaining video. Required Reading: The Economic Report of the President The Economic Report of the President can help identify the forces driving — or dragging — the economy.