Free Life Expectancy Calculator - Estimate Your Lifespan
Estimate your life expectancy based on age, sex, and health factors with actuarial data.
Formula & Methodology
This calculator establishes a baseline life expectancy according to biological sex at birth, then applies additive and subtractive modifiers representing generalized epidemiological impacts of lifestyle choices. For example, smoking reduces the estimate by 8 years, while vigorous activity can add 3 years.
- Adjusted Life Expectancy = Base Life Expectancy + Smoking Adjustment + BMI Adjustment + Activity Adjustment
- Years Remaining = max(0, Adjusted Life Expectancy - Current Age)
- Estimated Age at Death = Current Age + Years Remaining
Worked Example
Using the Life Expectancy Calculator: apply the formula above to your input values. For instance, Adjusted Life Expectancy = Base Life Expectancy + Smoking Adjustment + BMI Adjustment + Activity Adjustment, then Years Remaining = max(0, Adjusted Life Expectancy - Current Age). The tool performs each step instantly and shows the result.
Frequently Asked Questions
How is life expectancy estimated?
It uses your age and lifestyle inputs against statistical averages to project a general life-expectancy figure.
Can lifestyle really change life expectancy?
Yes. Factors like smoking, diet, exercise and family history meaningfully shift the estimate up or down.
Is this a medical prediction?
No. It is a statistical estimate for planning and awareness, not a personal medical forecast.