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 My Retirement Savings Estimate how long your retirement savings may last using various monthly cash flow rates. The Sequence of Returns A look at how variable rates of return impact investors over time. Working With A Financial Professional A financial professional is an invaluable resource to help you untangle the complexities of whatever life throws at you.