Biological Age Calculator
Estimate your biological age based on sleep, exercise, diet, stress, and other lifestyle factors.
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Biological age measures how old your body actually functions relative to your chronological age. Two people both aged 45 can have biological ages of 38 and 56 depending on lifestyle choices made over decades. This calculator uses validated lifestyle factors — sleep, exercise, diet, stress, smoking, alcohol, and social connection — to estimate where your body sits on the aging curve and what targeted changes would move the needle most.
Example
Exercise: 4×/week ✓
Scoring Approach
Base = Chronological age Each positive factor: −1 to −3 years Each negative factor: +1 to +5 years Biological age estimate = Base + Σ factor adjustments (Based on simplified models from published epidemiological research)
How Lifestyle Affects Biological Aging
Biological aging is measured by biomarkers like telomere length, epigenetic clocks (Horvath clock), inflammatory markers, and organ function. Lifestyle inputs — particularly sleep quality, regular aerobic exercise, and chronic stress level — are among the strongest modifiable predictors. Each factor has an independent effect; combining several can shift biological age by 5–10 years.
Frequently Asked Questions
Is this medically accurate?
It's a research-informed estimate, not a clinical test. Exact biological age requires bloodwork, epigenetic testing, or VO2 max measurement.
Can I reverse biological aging?
Yes, partially. Lifestyle interventions have been shown to reverse epigenetic age by 1–3 years over 8 weeks in controlled trials (Fahy et al., 2019).
What's the single biggest factor?
Chronic stress and sleep deprivation have disproportionate effects. Both accelerate inflammation and oxidative damage.
How often should I recalculate?
Every 3–6 months after making a significant lifestyle change gives enough time to see a meaningful shift in your score.