Answer 9 questions about your lifestyle. Get your real biological age — and exactly what to change to get younger.
■ Adds years
■ Significant impact
What Is Biological Age?
Biological age is how old your body actually is based on your physiology and lifestyle — not the number of years since you were born. Two people who are both 40 years old chronologically can have biological ages of 33 and 51, depending on how they live.
Research shows that lifestyle factors like sleep, exercise, diet, stress, and smoking can accelerate or slow cellular aging by a decade or more. This calculator estimates your biological age based on 8 scientifically validated lifestyle factors.
How This Calculator Works
We score each lifestyle factor based on published longevity research and apply age adjustments to your chronological age. Each factor contributes positively or negatively based on how your habits compare to optimal ranges. The result is your estimated biological age.
The 8 Factors That Affect Biological Age
Sleep is one of the most powerful aging factors. Chronic sleep deprivation increases inflammation, disrupts hormones, and accelerates cellular aging. 7–9 hours per night is the validated optimal range.
Exercise is the closest thing to a real anti-aging pill. Regular moderate-to-intense exercise activates longevity pathways, reduces inflammation, and can lower biological age by 2–5 years.
Diet quality affects cellular health through inflammation, oxidative stress, and nutrient availability. Whole-food diets consistently associate with lower biological age markers.
Chronic stress accelerates telomere shortening — the molecular clock of aging. High cortisol over years adds measurable biological years.
Smoking is the single largest lifestyle accelerant of aging. Heavy smoking can add 8+ biological years through oxidative damage, inflammation, and vascular changes.
Alcohol at moderate levels has neutral effects; heavy consumption accelerates liver aging, brain aging, and systemic inflammation.
BMI affects biological age through metabolic health, inflammation, and cardiovascular strain. Healthy weight (BMI 18.5–24.9) is associated with the lowest biological age.
Social connections have a surprisingly large effect on longevity. Social isolation increases mortality risk comparable to smoking 15 cigarettes a day.