Roth 401(k) vs. Traditional 401(k) This calculator compares employee contributions to a Roth 401(k) and a traditional 401(k). 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 Comparing Investments This calculator compares the net gain of a taxable investment versus a tax-favored one. The ABC’s of Auto Insurance What kind of auto insurance should you have? Do you know? Required Reading: The Economic Report of the President The Economic Report of the President can help identify the forces driving — or dragging — the economy.