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 Message Thank you! Oops! Related Content How Stocks Work Understanding how a stock works is key to understanding your investments. Estimate Your RMD Help determine the required minimum distribution from an IRA or other qualified retirement plan. Acres of Diamonds In life it often happens that the answers to our most pressing questions are right in our own backyards.