The Living to 100 Life-Expectancy Calculator was developed by Dr. Thomas Perls, founder of the New England Centenarian Study, the largest study of centenarians and their families in the world. The people working on the study are vigorously looking for the genetic key to longevity
The calculator asks you 40 quick questions related to your health and family history, and takes about 10 minutes to complete. (It takes longer if you lie or cheat, so be honest!)
It calculates how many years you are likely to live based on your lifestyle, by incorporating numerous observational studies and actuarial science, a method using statistical and mathematical research (this is used by insurance companies to determine how healthy you are compared to others in your age group.) The average life expectancy in the United States is about 75 years old; most of the people taking the test fall near there.
If you would like to calculate your life expectancy, visit livingto100.com.