Then the user should use the calculator one time quickly to determine just what information he or she will need to enter and what the resulting information might provide. Then the next step would be to gather the information that the retirement calculator is going to ask for. This helps give accurate results that can be relied on for retirement planning. The instructions for using the retirement calculator should be read and reread until thoroughly understood before being used. When online the GIGO concept applies to retirement calculators too. More on retirement coaches.