Saving for Retirement This calculator can help you estimate how much you may need to save for retirement. 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 Life and Death of a Twenty Dollar Bill How long does a $20 bill last? Federal Income Tax Use this calculator to estimate your income tax liability along with average and marginal tax rates. Changing Unhealthy Behaviors Five phases to changing unhealthy behaviors.