Life Expectancy Calculator
Estimate your life expectancy based on lifestyle factors.
See how exercise, diet, smoking, and other habits affect your expected lifespan.
Life expectancy estimation starts with a population baseline for your sex and age, then applies well-documented adjustments based on lifestyle factors studied in large longitudinal health studies.
Base life expectancy (developed countries, 2025 WHO data):
- Male: 76 years
- Female: 81 years
Adjustment formula:
Estimated Lifespan = Base + Exercise Adj + Weight Adj + Smoking Adj + Alcohol Adj + Sleep Adj + Social Adj + Diet Adj
Evidence-based lifestyle adjustments:
| Factor | Impact on Lifespan |
|---|---|
| Regular exercise (150+ min/week) | +3 to +7 years |
| Healthy body weight (BMI 18.5–24.9) | +2 to +4 years |
| Non-smoker vs. smoker | +10 years |
| Moderate alcohol (1–2 drinks/day) | +0 to +1 year |
| No alcohol | Neutral (vs. light drinker) |
| Strong social connections | +3 to +5 years |
| Mediterranean-style diet | +2 to +4 years |
| Consistent 7–8 hours sleep | +2 to +3 years |
| Low chronic stress | +2 to +3 years |
Worked example: A 35-year-old woman: base 81 years
- Exercises 4× per week: +5 years
- Healthy weight: +3 years
- Non-smoker: +10 years (vs. smoker baseline)
- 7 hours sleep nightly: +2 years
- Estimated lifespan: ~86–90 years
Important context: This is a statistical population estimate, not a medical prediction. Individual genetics, access to healthcare, geography, and random life events play enormous roles. Use this as a motivational tool — not a diagnosis. Consult a physician for personalized health guidance.