The living to 100 questionnaire estimates people’s potential for long life based on their answers to 40 questions that assess lifestyle (E.G., nutrition, exercise), environment, medical factors, and family history.
The calculator assumes we can live to age 85 or more with a good set of genes. Healthy behaviors can increase life expectancy as much as 10 years, while unhealthy behaviors decrease years.
The longest-lived human on documented record is Jeanne Calment of France, who died in August 1977 at 122 years of age. Calment outlived her husband, her daughter, her grandson, and even her lawyer, who made an unusual agreement with her. Believing that Calment, who was 90 years old at the time, probably had few years left, the lawyer, age 47, offered to buy her apartment in exchange for giving her a lifetime monthly pension. Soon after her 120th birthday, the lawyer died at age 77, and the pension payments he’d made to her equaled more than three times the worth of the apartment.
My current life expectancy, according to that calculator, is 85 years. If I lose down to a normal weight, quit drinking, and start exercising, it goes up to 91.