Biological age calculator from blood tests
Biological age shows how “worn” the body is compared to calendar age. This calculator uses the PhenoAge method: from 9 blood markers (chemistry + complete blood count) and your age it estimates the phenotypic age. Enter the values from your report — see your biological age and the difference from calendar age.
Calculate biological age
Enter age and 9 blood markers — the biological age appears instantly.
What the gap between bio and calendar age means
A biological age below calendar age is a good sign; above it, a reason to look at lifestyle and health. This is a population estimate from a single measurement, not a diagnosis.
| Bio vs calendar age | What it means |
|---|---|
| 3+ years younger | Body “younger” than age |
| ±3 years | In line with calendar age |
| 3–8 years older | Worth paying attention |
| 8+ years older | Reason to see a doctor |
What biological age is
Calendar age is counted from your birth date, while biological age reflects the body’s real state — it can be lower or higher than calendar age. It is estimated from objective markers; one validated method is PhenoAge from blood tests.
A biological age below calendar age is associated with lower health risks, above with higher. It is a handy metric to track the effect of lifestyle changes.
How it works: the PhenoAge method
PhenoAge (Levine, 2018) combines 9 markers — albumin, creatinine, glucose, C-reactive protein (CRP), lymphocyte percentage, mean cell volume (MCV), red cell distribution width (RDW), alkaline phosphatase and white blood cell count — plus calendar age, and returns the phenotypic age via a published formula.
Values are entered in common lab units (albumin g / L, creatinine µmol / L, glucose mmol / L, CRP mg / L, etc.). All 9 are needed — a standard chemistry panel plus a complete blood count.
What to do with the result
If the biological age is above calendar age, it is a cue to look at what drives the markers: diet, weight, activity, sleep, inflammation, glucose and cholesterol. Many of these are reversible.
Re-testing a few months after changes shows whether the biological age has “dropped”. It is a motivating tracker, not a verdict.
Limitations
This is an estimate from a single measurement and a population model — it does not capture everything (genetics, chronic disease, medications, acute conditions affecting CRP and WBC). During acute inflammation/infection the result is overestimated.
Biological age is a helper metric, not a medical diagnosis or an individual prognosis.
A guide, not a diagnosis
The calculator helps you see the big picture and track trends. Marker deviations and their causes are assessed by a doctor; a sharply “aged” biological age is a reason to review the labs with a specialist.
Biological age is computed from blood tests
Upload your chemistry and CBC report — AI reads every value, links them and suggests what to improve.
This calculator is for reference and information only and is not a diagnosis. Biological age is a model estimate; a doctor interprets the markers.