⏳ Life Expectancy Calculator

It starts from a baseline of 78 years (an example value close to the average of high-income countries) and applies lifestyle adjustments: smoking −10, no exercise −3 / regular +3, poor diet −3 / good +3, heavy drinking −3, poor sleep −2, under/overweight −2 / obese −5. These points are simplified, illustrative values reflecting the general direction found in epidemiological research — they are not precise effect sizes that apply to any individual. In other words, this is an educational model to make tangible the fact that lifestyle influences longevity.

Real lifespan is shaped by genetics, underlying conditions, access to healthcare, income and education, living environment, accident risk, and many other factors this tool does not model. Statistical life expectancy also varies widely by country, sex, and birth year (e.g. over 86 for women in Korea and Japan, under 60 in some countries). Smoking, exercise, diet, and sleep are worth attention because they are factors individuals can change — but always consult a medical professional for assessing and managing your health.