Life Expectancy Calculator

This calculator starts from the current U.S. average life expectancy for your sex (2024 CDC data: 76.5 years for men, 81.4 for women), then adjusts up or down based on well-documented lifestyle factors — smoking, exercise, diet, and alcohol. The result is a rough personalized estimate, not a prediction.

A lot. Research from the U.S. Surgeon General finds that lifelong smoking reduces life expectancy by roughly 10 years on average. Quitting reverses much of that risk over time — former smokers regain years compared with those who keep smoking.

Yes. Large studies show that not smoking, regular physical activity, a healthy diet, and moderate alcohol use are each linked to meaningful gains in life expectancy — often several years each. Combined, healthy habits can add a decade or more versus an unhealthy lifestyle.

No — it is an educational estimate based on population averages and a few lifestyle factors. It cannot account for genetics, medical history, accidents, income, or where you live. Treat it as motivation to build healthy habits, not a forecast.

On average women outlive men by about 5 years in the U.S. The reasons are a mix of biological factors (hormonal and genetic differences) and behavioral ones (men historically smoke more, take more physical risks, and see doctors less often). The gap has been slowly narrowing.