Life Expectancy Calculator — Estimate Lifespan
Estimate life expectancy based on age, gender, and lifestyle factors. This is an educational tool based on actuarial data averages. See also our BMI Calculator and Age Calculator.
How to Estimate Life Expectancy
- Enter your current age and gender.
- Select your smoking status and exercise frequency.
- Choose your BMI category and alcohol consumption level.
- Indicate your family longevity history.
- Click Calculate to see your estimated life expectancy.
Formula
Base Life Expectancy = Gender Average (Male: 76, Female: 81)
Adjusted = Base + Exercise Bonus - Smoking Penalty - BMI Penalty
- Alcohol Penalty + Family History Adjustment
Years Remaining = Adjusted Expectancy - Current Age
Example
35-year-old male, never smoked, moderate exercise
Normal BMI, moderate alcohol, average family history
Base: 76 + 0 (no smoking) + 0 (moderate exercise) = 76
Years remaining: 76 - 35 = 41 years
Life Expectancy Factors Reference
| Factor | Impact |
|---|---|
| Current smoking | -10 years |
| Former smoking | -3 years |
| Sedentary lifestyle | -5 years |
| Regular exercise | +3 to +5 years |
| Obesity (BMI 30+) | -6 years |
| Heavy alcohol use | -5 years |
| Family longevity (85+) | +5 years |
Frequently Asked Questions
How accurate is this calculator?
This provides a rough estimate based on population-level statistics. Individual outcomes depend on genetics, healthcare access, environment, and many other factors not captured here.
What has the biggest impact on life expectancy?
Smoking is the single largest modifiable risk factor, reducing life expectancy by approximately 10 years on average for lifelong smokers.
Can I increase my life expectancy?
Yes. Quitting smoking, regular exercise, maintaining a healthy weight, moderate alcohol consumption, and managing stress can all increase life expectancy.
Why do women live longer than men on average?
Women have a 5-year advantage on average due to biological factors (hormones, genetics), lower rates of risky behavior, and generally better healthcare utilization.
Is this medical advice?
No. This is an educational tool only. For health concerns or personalized longevity assessments, consult your healthcare provider.