Biological Age Calculator
Estimate your biological age — how old your body acts compared with your years — from lifestyle factors. Start with your chronological age, then adjust for smoking, exercise, diet, and sleep to see whether your habits add or subtract years.
- Simplified lifestyle model; not a validated clinical measure.
Formula
Biological age = chronological age + lifestyle adjustments
- Your biological age starts from your chronological age and is nudged up or down by lifestyle factors.
- Smoking adds years (current smoking more than ex-smoking); regular exercise, a good diet, and healthy sleep subtract years, while poor habits add them.
- The difference shown is the net adjustment — a negative value means your habits make your body 'younger' than your age.
- This is a simplified educational model, not a validated clinical biomarker test (such as DNA-methylation 'epigenetic clocks').
- Use it to see how habit changes might shift the estimate, not as a medical diagnosis.
35-year-old, current smoker, no exercise
Inputs
- Chronological Age: 35 years
- Smoking: current
- Exercise: none
- Diet Quality: average
- Sleep: ok
Starting at 35, current smoking adds 6 years and no exercise adds 3, for a +9 adjustment — an estimated biological age of 44.
Frequently asked questions
What is biological age?
Biological age is an estimate of how old your body seems to function compared with your chronological age (the years since you were born). Healthy habits can make it lower; unhealthy ones can make it higher.
How is this different from my real age?
Your chronological age only counts time. Biological age tries to reflect the wear and tear on your body, which is heavily influenced by lifestyle choices like smoking, exercise, diet, and sleep.
How accurate is this estimate?
It is a simplified educational model, not a clinical measurement. Lab-based tests such as epigenetic clocks are far more precise. Treat the number as a motivational guide, not a diagnosis.
Can I lower my biological age?
The model rewards quitting smoking, exercising regularly, eating well, and sleeping 7–8 hours — the same habits research links to healthier ageing.
Should I rely on this for medical decisions?
No. For any health concern, talk to a qualified healthcare professional who can assess you properly.
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