BioAge

Biological Age Estimator

Younger, older, or right on schedule — a rough biomarker-based estimate.

Chronological age

Resting heart rate (bpm)

VO₂ max

Weekly active minutes

Estimated biological age

32.5

2.5 years younger than chronological

What you entered

Chronological age: 35Resting HR: 62 bpmVO₂ max: 42Weekly active min: 150

1
Resting heart rate adjustment
(62−60) × 0.15= +0.3 yrs
2
VO₂ max adjustment
−(42 − 40.5) × 0.5= -0.8 yrs
3
Activity adjustment
≥150 min/wk active= -2 yrs
4
Sum adjustments onto chronological age
35 + (0.3 + -0.8 + -2)= 32.5 years

Result

Estimated biological age: 32.5

Your estimated biological age is 32.5 — this is a rough wellness indicator from a handful of accessible markers, not a clinical measurement.

Estimated biological age at three fitness profiles

Each column fixes a resting heart rate, VO2 max, and weekly active minutes, then runs every chronological age through the same estimator. VO2 max is scored against an age-adjusted average, which is why one VO2 number looks better the older you are.

Chronological age (yrs)	Low: RHR 78, VO2 28, 30 min/wk	Mid: RHR 68, VO2 36, 120 min/wk	High: RHR 55, VO2 48, 300 min/wk
25	38.5	30.9	21.3
30	42.2	34.7	25.0
35	46.0	38.5	28.8
40	49.7	42.2	32.5
45	53.5	46.0	36.3
50	57.2	49.7	40.0
55	61.0	53.5	43.8
60	64.7	57.2	47.5

The estimator starts from your chronological age, adds about 0.15 years for every bpm of resting heart rate above 60 (and credits 0.10 years per bpm below it), subtracts 0.5 years per point of VO2 max above the age-adjusted average of 48 minus 0.5 times (age minus 20), then applies a flat 2-year credit at 150 or more active minutes a week or a 2-year penalty below 60. It is a fitness proxy, not a clinical epigenetic or blood-biomarker test, and it will not read below 15. Use it to watch your own trend over time rather than to compare yourself with anyone else.

How your body is aging vs. your calendar

Biological age looks at measurable fitness markers — resting heart rate, cardiovascular fitness, activity level — rather than the number of birthdays you've had, since two people the same chronological age can have very different underlying health trajectories.

A motivational estimate, not a medical one

This is a rough wellness indicator based on a handful of accessible inputs, not a clinical biological-age test (which typically uses blood biomarkers or DNA methylation) — useful for tracking your own trend over time rather than as a diagnosis.

Frequently asked questions

What is biological age vs chronological age?

Chronological age is years since birth. Biological age reflects how well your body actually functions — a 50-year-old who exercises, sleeps well, and doesn't smoke may have a biological age of 38, while a sedentary, stressed 35-year-old might test at 45. It's measured through fitness markers, blood tests, or DNA methylation.

Can you lower your biological age?

Yes. Regular aerobic exercise, strength training, quality sleep, stress management, and a nutrient-rich diet can measurably reduce biological age markers. Studies show that lifestyle interventions can reverse biological age by 1–3 years within months. The biggest impacts come from increasing exercise and improving sleep quality.

How is biological age tested clinically?

Clinical tests use epigenetic clocks (DNA methylation patterns), telomere length measurement, or comprehensive blood panels (inflammation markers, metabolic markers, hormone levels). Companies like Elysium (Index) and TruDiagnostic offer consumer epigenetic tests. This calculator uses simpler fitness proxies for a free, accessible estimate.