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 How Big is Money? Learn a little about worldwide currency in this fun infographic Separating the Signal From the Noise A good professional provides important guidance and insight through the years. The Long Run: Women and Retirement For women, retirement strategy is a long race. It’s helpful to know the route.