Lifestyle Life Expectancy Estimator

No. This is an educational calculator, not a diagnosis, medical recommendation, insurance estimate, or actuarial forecast. It cannot predict how long one person will live.

The calculator looks up remaining life expectancy in the 2023 U.S. actuarial life table using the entered sex and exact age. It applies smoking status by multiplying future age-specific death probabilities by an approximate all-cause mortality hazard ratio from Jha et al. The remaining lifestyle inputs currently use provisional year adjustments and will be converted to hazard-ratio factors later.

Large population studies associate lifestyle factors with different mortality rates. For example, smoking is strongly associated with lower life expectancy [4], while higher daily step counts are associated with lower all-cause mortality in cohort studies [5].

Sleep duration and psychosocial stress are associated with health outcomes in population research. Sleep studies often show higher risk at very short and very long sleep durations [6]. Stress is harder to model because self-reported stress is subjective and overlaps with work, mental health, income, relationships, and existing disease.

A biological age calculator usually tries to estimate how old the body appears from biomarkers or physiology. This tool is simpler: it estimates an age-at-death scenario from lifestyle choices. That framing is easier to explain, but it still remains uncertain.

That is the intended next step. A stronger version would use age, sex, and country-specific mortality tables as the baseline, apply published hazard ratios for lifestyle factors, then compute expected remaining years from the adjusted mortality curve.