How accurate is this biological age calculator?

This calculator provides an estimate based on validated lifestyle factors associated with cellular aging. For a clinical-grade biological age assessment, consult a longevity physician and consider epigenetic clock tests (e.g., DunedinPACE or Horvath clock).

Can you reverse your biological age?

Research shows that lifestyle changes — optimized sleep, regular exercise, anti-inflammatory nutrition, stress management, and targeted supplementation — can meaningfully reduce biological age. Studies like Fahy et al. (2019) demonstrated a 2.5-year reduction in 1 year using combined interventions.

What factors affect biological age the most?

The most impactful factors include: sleep quality and consistency (7–9 hours), regular aerobic and strength training, a whole-foods diet rich in vegetables, chronic stress management, and avoidance of smoking and excessive alcohol.

Free Longevity Assessment Tool

Biological Age Calculator

Q: What is biological age?

Biological age is a measure of how old your body's cells and systems actually are — as opposed to your chronological age (years since birth). It is determined by lifestyle factors, genetics, and biomarkers, and can be significantly younger or older than your calendar age.

Discover how old your body really is. Answer 15 lifestyle questions and receive a personalized biological age score with a science-backed breakdown and actionable recommendations.

Science-backed questions

Health dimensions analyzed

<3 min

To complete

Free

No sign-up required

Your Age

Assessment

Results

What's your chronological age?

We'll use 15 science-backed questions across 5 health dimensions to calculate how old your body actually is.

5 dimensions analyzed

Sleep

Movement

Nutrition

Stress

Biohacking

Research-Backed

The Science Behind Biological Age

Your biological age is not fixed. Research shows it can accelerate or reverse based on lifestyle choices — here's what the evidence says.

Epigenetic Clocks

DNA methylation patterns (Horvath clock, DunedinPACE) can measure cellular aging with high accuracy. Your lifestyle directly reprograms these molecular switches.

Sleep & Telomere Length

Chronic sleep deprivation accelerates telomere shortening — a key marker of cellular aging. Seven to eight hours of quality sleep correlates with significantly longer telomeres.

Exercise as Anti-Aging Medicine

Regular aerobic and resistance training activate sirtuins, reduce senescent cells, and have been shown to lower biological age by 3–10 years in longevity studies.

Time-Restricted Eating

Intermittent fasting triggers autophagy — cellular self-cleaning — and activates longevity pathways including mTOR inhibition and AMPK activation.

Stress & Cortisol Aging

Chronic psychological stress accelerates epigenetic aging. Studies show that consistent mindfulness practice can reduce biological age by 1–3 years within 12 months.

Longevity Supplementation

NAD+ precursors (NMN/NR), resveratrol, and spermidine support mitochondrial function and have demonstrated age-reversal effects in multiple human and animal studies.

How the Assessment Works

Three simple steps to uncover your true biological age.

Enter Your Chronological Age

We start with your calendar age as the baseline. Everything from here is about revealing how your biology compares.

Answer 15 Lifestyle Questions

Across five scientifically validated dimensions: sleep quality, exercise habits, nutrition and fasting, stress resilience, and biohacking protocols.

Receive Your Personalized Report

Get your biological age score, a breakdown by health category with insight into which areas accelerate or slow your aging, and prioritized recommendations.

Frequently Asked Questions

What is biological age?

Biological age measures how old your body's cells and systems actually are — based on lifestyle, genetics, and biomarkers — as opposed to your chronological age (years since birth). It can be significantly younger or older than your calendar age.

How accurate is this calculator?

This tool provides a lifestyle-based estimate using research-validated factors. For a clinical-grade result, consider epigenetic clock tests (DunedinPACE, Horvath clock) available through longevity clinics and direct-to-consumer labs.

Can you actually reverse your biological age?

Yes — multiple studies confirm this. Fahy et al. (2019) demonstrated a 2.5-year reversal in 1 year using diet, exercise, sleep, and supplements. See our Longevity section for actionable protocols.

How often should I retake this assessment?

Every 90 days as you implement changes. Significant lifestyle improvements — especially in sleep and exercise — can measurably shift your biological age in 8–12 weeks.

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