Life Expectancy Calculator
What this life expectancy tool does
This Life Expectancy Calculator gives a rough estimate of how long you might live based on a few lifestyle choices: smoking status, activity level, body weight category, and stress. It combines this with your current age and sex to estimate an approximate age and remaining years.
It is not a medical prediction and cannot account for personal medical history, genetics, or unexpected events.
How the calculator works
- Enter your current age in years.
- Select Male or Female.
- Choose your smoking status (non-smoker, former, or current).
- Pick your usual activity level, weight category, and stress level.
- Click Calculate to see a rough estimate of:
- Estimated total life expectancy (age in years)
- Estimated remaining years from today
- Use Copy or Share to save or send your result.
What each question means
- Age: Your current age in full years.
- Sex: Male or female, used because average life expectancy is slightly different.
- Smoking status: Non-smoker, former smoker, or current smoker.
- Activity level: How active you are in a typical week.
- Weight category: A simple self-rated category (underweight, healthy, overweight, obese).
- Stress level: How often you feel stressed in daily life.
Tip: Answer as honestly as possible. The result is anonymous and only for you.
How the estimate is built
The tool starts from a simple average life expectancy for your sex, then adds or subtracts a few years based on:
- Smoking: Current smoking generally reduces the estimate, especially compared to non-smokers.
- Activity: Regular movement and exercise usually increase the estimate.
- Body weight category: Being far under or over a healthy weight may reduce the estimate.
- Stress: High, constant stress may slightly reduce the estimate.
These adjustments are simplified and based on general population trends, not on individual medical data.
How lifestyle can change the estimate
The numbers are only rough, but they can show how healthier choices may push your estimated life expectancy upward, while risky habits may pull it downward.
Use the estimate as motivation for healthier habits, not as a fixed number.
Helpful tips
- Focus less on the exact number and more on the overall message.
- Use the tool before and after lifestyle changes to see how the estimate shifts.
- Combine this tool with other health tools (BMI, BMR, TDEE) for a broader picture.
- Talk to a healthcare professional if you want a deeper, personalized assessment.
Common mistakes
- Treating the number as a promise or prediction.
- Using the result to compare with friends or judge others.
- Ignoring serious symptoms or health issues because the estimate looks “good.”
- Forgetting that genetics, environment, and accidents are not included.
Frequently asked questions
How accurate is this life expectancy calculator?
It is only an approximation based on simple lifestyle factors. Real life expectancy depends on many other things: genetics, medical history, healthcare access, environment, and chance.
Can I use this to decide medical treatments?
No. Never use this tool as the basis for medical decisions. Your doctor can give you advice that fits your personal situation.
Why does my estimate change when I adjust one answer?
Each lifestyle factor adds or removes a few years in the simple model. Small changes are normal and reflect how different habits can influence overall health risk.
What if the result worries me?
Remember that this is only a rough number. If you feel concerned, consider sharing the results with a healthcare professional and asking how to improve your long-term health.
Important disclaimer
This Life Expectancy Calculator is for educational and informational use only. It does not diagnose, prevent, or treat any disease, and it cannot predict how long any individual person will live. Always consult a qualified health professional for medical advice and decisions.