How old is your body really?
Estimate your biological age from 9 blood values using the scientific PhenoAge method.
Biological age calculator
Biological age calculator
Enter your blood values — you will find them on your lab report. Everything is calculated in your browser and never leaves your device.
This estimate is based on the PhenoAge formula (Levine, 2018) and is intended for education, not medical diagnosis. Blood values vary by laboratory and method. Always discuss your results with your doctor.
What is biological age?
Your calendar age counts the years since you were born. Your biological age estimates how old your body is functioning, based on blood values linked to ageing and health.
How is it calculated?
This tool uses the PhenoAge method: a scientifically validated formula that combines 9 blood values and your age into a single estimate of your phenotypic (biological) age.
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Frequently asked questions
What is the PhenoAge method?
PhenoAge is a biological-age model from 2018 (Levine et al.) that combines 9 blood values and your age into an estimate of your biological age. It was developed from large population studies and is linked to health and ageing.
Which blood values do I need?
You need 9 values: albumin, creatinine, glucose, CRP, lymphocytes, MCV, RDW, alkaline phosphatase and white blood cells — plus your age. They appear together on a comprehensive blood test.
Which units should I use?
Use the units reported by European laboratories (g/L, µmol/L, mmol/L, mg/L, %, fL, U/L and 10⁹/L). The correct unit is shown next to each field.
Are my entered values stored?
No. The calculation happens entirely in your browser: your entered values never leave your device and are not stored anywhere.
How accurate is the estimate?
It is an estimate based on population data, not a medical diagnosis. Use it as a starting point to understand your health and discuss any abnormal values with your doctor.
Want to know your real blood values?
A comprehensive blood test measures all the values you need here — and many more.