Health & Body Composition
Biological Age Calculator
Your body can age faster or slower than the calendar. This lifestyle-based estimate shows which habits are adding years, and which are taking them off.
Biological age estimates how old your body behaves based on lifestyle markers such as exercise, sleep, diet, and smoking, compared with your chronological age. A lower biological age suggests slower ageing; a higher one suggests faster ageing. Results are screening estimates, not diagnoses — confirm with a clinician before acting on them.
Habits, not just genes, set your pace of ageing.
Smoking is the single biggest age adder.
Exercise and sleep are the biggest subtractors.
Calculate Your Biological Age
Your Biological Age
What Is Biological Age?
Biological age estimates how old your body behaves, compared with how long you've been alive. People with the same chronological age can differ biologically by a decade or more.
This calculator uses published lifestyle associations, smoking, exercise, sleep, diet, alcohol, stress, and BMI, to adjust your chronological age. It's an educational estimate: research-grade biological age uses DNA methylation and physiological biomarkers.
How It Is Calculated
Biological age = chronological age + Σ habit adjustments
Example: Example: 35-year-old daily smoker with poor sleep may score ≈ 44 biological years
Habit adjustments used in this model
| Habit | Effect on biological age |
|---|---|
| Daily smoking | +8 years |
| Regular exercise (3+/week) | −4 years |
| Sleeping under 6 hours | +2 years |
| Daily fruit & vegetables | −2 years |
| BMI ≥ 30 | +4 years |
| High chronic stress | +3 years |
Limitations
- Lifestyle model only, no biomarkers, genetics, or medical history.
- Effects are population averages; individuals vary.
- Smoking and sleep questions are self-reported and approximate.
- Use as motivation, not as a medical assessment.
Sources & Review
References used for this calculator’s formulas and thresholds:
Biological Age FAQ
What is a good biological age?
A biological age below your chronological age is the goal, it suggests your habits are protective and your body is ageing slower than average.
Can I lower my biological age?
Yes. The strongest levers are quitting smoking, regular exercise, 7–9 hours of sleep, a plant-forward diet, and keeping BMI under 25.
How accurate is a lifestyle biological age?
It's an educational estimate. Clinical biological age uses biomarkers like DNA methylation clocks; this model approximates the direction and size of habit effects.
Does genetics decide biological age?
Genetics sets a baseline, but twin studies show lifestyle shifts biological age substantially, habits matter more than most people assume.
Please read this first: these results are educational estimates, not medical advice. For decisions about your health, talk to a qualified professional.