Understand this is a game. This is only a game. It's a best guess, really, based on your background, health and lifestyle.
It uses the most current information gathered by the life insurance industry, public health organizations, and scientific studies.
You start by clicking a button and then, simply fill in the information on a bunch of pop-up windows. The questions drill down, asking about your driving, seat belt usage, smoking and drinking habits, drug use and diet.
It calculates all that you input, crunches your data through mortality tables and the like, and gives you a guess at your longevity - just how long you can expect to live - living like you currently do - based on the averages.
Bottom line and the reason for the site: if you don't like your score, change your answers to see where making different choices could improve your numbers.