Many websites offer online calculators to help you see where you are, and where you need to be financially in order to hit your retirement goals. Money has devised and offered such an online calculator. Similar websites generally allow you to input a few pieces of information, such as your age, your current salary or income, and your current savings available for retirement. Some of these calculators even take into consideration at what age you wish to retire, and what income you wish to have while retired.