Free Tool
How old is your body, really?
Your chronological age is a date. Your biological age is a measurement. Enter nine values from a standard blood panel and this calculates your phenotypic age using the Levine formula, published in 2018 and validated against ten-year mortality data in more than eleven thousand adults.
Your numbers
All nine markers appear on a complete metabolic panel, a complete blood count with differential, and an hs-CRP. If you have had recent labs, you already have them.
The greyed values are examples only, roughly typical for a 45-year-old. Replace them with your own.
Enter your nine values and your phenotypic age will appear here, along with how it compares to your chronological age.
A number is a starting point, not an answer. If yours is higher than you expected, the useful question is which marker is driving it and what can be done about it. That is what a proper laboratory review is for.
Book a Lab ReviewAbout this calculator. Phenotypic age was developed by Morgan Levine and colleagues and published in 2018. It combines nine routine blood markers with chronological age to estimate physiological ageing, and predicts ten-year all-cause mortality more accurately than chronological age alone. It is a validated research measure, not a diagnostic test, and it does not replace clinical evaluation. Nothing you enter is stored or transmitted. The calculation runs entirely in your browser.
Written and clinically reviewed by Jessica Boggs, MSN, APRN, FNP-C, ENP-C, founder of Navara Health. Medical oversight by Simal Patel, MD.
Last reviewed September 6, 2026. This page is general information, not medical advice, and does not create a provider relationship.
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