Longevity · Wellness education
Understand lifestyle factors linked to longevity.
Learn how life expectancy calculators use population life tables and lifestyle context — and how Carthalis explores personalized longevity estimates in Twin after you create a free account.
By Aziz Mezlini, PhD · Founder & Scientist, Carthalis · Updated 2026-05-25
Wellness education, not diagnosis · Not for emergencies
What life expectancy calculators estimate
A life expectancy calculator is an educational wellness tool that relates age, lifestyle habits, fitness signals, and optional health context to population-based longevity estimates — not exact lifespan prediction or a clinical mortality forecast.
Carthalis is your personal health companion for longevity curiosity: this longevity calculator educational guide explains how life expectancy calculators work before any personalized estimate appears in Twin. Wellness education, not diagnosis.
Health planning
Make informed decisions about lifestyle changes and wellness priorities with educational context.
Risk awareness
Identify modifiable factors that may relate to longevity estimates — not clinical prognosis.
Motivation
See how positive habits may relate to longevity-oriented wellness scores over time.
How longevity calculators work — and the Carthalis approach
After you sign up, personalized life expectancy and longevity estimates unlock inside Twin — not on this page. Carthalis combines the profile, labs, and habits you choose to share using research-informed longevity methodology, including Social Security Administration life tables (table4c6), twin-scores-life_expectancy, Evidence-based lifestyle adjustment factors.
Base life expectancy
Uses Social Security Administration life tables as the foundation for age- and sex-specific population longevity estimates.
Lifestyle adjustments
Applies evidence-based adjustments for smoking, exercise frequency, diet quality, stress, and other modifiable lifestyle factors.
Health and fitness integration
Incorporates medical conditions, lab values, and fitness metrics you choose to share for personalized educational estimates inside Twin.
Data source: Based on Social Security Administration life tables and validated health research. Estimates include transparent caveats about prediction limitations — wellness education, not clinical certainty.
| Input pathway | What you share | What Twin uses |
|---|---|---|
| Profile surveys | Age, lifestyle, validated wellness questionnaires | Baseline longevity context and life expectancy methodology |
| Uploaded labs | Blood work PDFs you choose to import | Biomarker trends for educational longevity and life expectancy scores |
| Logged habits | Fitness, nutrition, sleep, and recovery logs | Longitudinal lifestyle signals for longevity estimates |
| Optional wearables | Apple Health, Health Connect, or linked devices when ready | Activity, heart, and recovery signals — never required to start |
Wearables when you choose to connect them can deepen recovery and activity context — but profile surveys, uploaded labs, and logged habits are enough to begin. The Twin life expectancy score grows richer as you add data over time.
Where estimators fail — honest caveats
- Life expectancy calculators provide estimates based on current data — no calculator can predict exact lifespan.
- Unforeseen events, medical advances, and individual variation can significantly impact actual longevity.
- Estimates are for educational purposes only and should not replace medical advice from your physician.
- Carthalis is not a medical device — wellness education, not diagnosis or clinical prognosis.
- Wellness education, not diagnosis.
- Not for emergencies — call your local emergency line.
- Carthalis is not a medical device.
- Life expectancy estimates are general guidance — speak to your physician about health decisions.
Estimate your life expectancy
A Statistics Canada conditional-life-table baseline adjusted for the lifestyle factors with the strongest mortality evidence (smoking, BMI, activity, diet pattern, alcohol — Li 2018, Kitahara 2014). Computed entirely on this page — nothing is stored.
Estimate your life expectancy
A Statistics Canada baseline adjusted for the lifestyle factors with the strongest evidence in Li 2018. Wellness education — not a clinical prediction.
Your inputs
Your result
Fill in your inputs to see your personalised result here. The calculator runs entirely on this page — no signup required to try.
Population-level estimate, not a personalised clinical prediction. Wellness education, not diagnosis.
Sign up for the full Carthalis Twin estimate, which combines this lifestyle baseline with your wearable, lab, and longitudinal data.
Save your result with a free accountThis is a population-level lifestyle projection, not a clinical prediction. For a fuller estimate that also integrates wearables, labs and longitudinal trends, the Carthalis Digital Twin runs the same engine on your private data after signup.
Wellness education, not diagnosis.
Continue in the app — get your Twin estimate
Create a free account to explore personalized life expectancy and longevity-oriented wellness scores inside Twin — using profile surveys, uploaded labs, logged habits, and optional wearables when you choose to connect them.
Sign up for your personalized longevity and biological-age estimates on Twin — using your profile, labs, and wearables when you choose to connect them.
Common questions
Start with Carthalis
Explore your longevity estimate on Twin
Read the methodology above, then create an account when you are ready for a personalized longevity panel — wellness education, not diagnosis.
Sign up for your personalized longevity and biological-age estimates on Twin — using your profile, labs, and wearables when you choose to connect them.
- Wellness education, not diagnosis.
- Not for emergencies — call your local emergency line.
- Carthalis is not a medical device.
- Life expectancy estimates are general guidance — speak to your physician about health decisions.