A free biological age calculator that uses PhenoAge on nine markers from a standard blood test, next to your real age.
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General wellness education, not medical advice. Talk to your doctor before you change how you train or eat, especially if you have a health condition, take medication or are pregnant. Read the disclaimer
Biological age
Your biological age from nine markers on a standard blood test, next to your real age. It uses Phenotypic Age (Levine et al., 2018), built on 9,926 US adults and checked on 6,209 more.
Your answers stay in this browser. Nothing is stored on my side.
This free biological age calculator works out your biological age from nine markers on a standard blood test, and puts it next to your real age. It uses Phenotypic Age, a formula published in 2018.
Paste your lab results or type them in, and your blood test stays in your browser.
Here's what biological age is, which blood test you need, how to read your result, and how to track it over time.
What is biological age?
Biological age is an estimate of how old your body acts. Your chronological age is the years since you were born.
Phenotypic Age estimates it from nine blood markers and your age. It was built on 9,926 US adults and checked on 6,209 more, with up to 12 years of follow-up, where it was a strong predictor of disease and death.
Biological age vs chronological age
- What it is
- The years since you were born
- Where it comes from
- Your birthday
- What it is
- An estimate of how old your body acts
- Where it comes from
- Nine markers on a blood test, and your age
- What it is
- Each company's own estimate
- Where it comes from
- WHOOP, Oura, Bevel or Garmin, worked out their own way
The nine markers and where they come from
Three common tests give you all nine. Ask for them by name:
- Test
- Metabolic panel (CMP)
- Units, US or metric
- g/dL or g/L
- Test
- Metabolic panel (CMP)
- Units, US or metric
- mg/dL or µmol/L
- Test
- Metabolic panel (CMP)
- Units, US or metric
- mg/dL or mmol/L
- Test
- Metabolic panel (CMP)
- Units, US or metric
- U/L
- Test
- hs-CRP
- Units, US or metric
- mg/L
- Test
- Blood count with differential (CBC)
- Units, US or metric
- %
- Test
- Blood count (CBC)
- Units, US or metric
- fL
- Test
- Blood count (CBC)
- Units, US or metric
- %
- Test
- Blood count (CBC)
- Units, US or metric
- 10³/µL or 10⁹/L
The calculator takes either set of units and converts them for you.
How to work out yours
What your result means
A number under your real age means your markers look like those of younger people in the study. A number over it means the opposite.
It's an estimate for one day, not a diagnosis. Take each test the same way, and compare them over time.
Track it over time
Every blood test you add sits beside the last, with its own biological age. Save your plan, and next time you open it, your new test goes next to the old ones.
Add your tracker's age too, on the Tests step, to see WHOOP, Oura, Bevel or Garmin next to your blood test.
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Biological age calculator FAQs
Questions about the biological age calculator? Here's what to know.
A biological age calculator estimates how old your body acts, from measures like blood markers.
This one uses Phenotypic Age on nine markers from a standard blood test.
Chronological age is the years since you were born.
Biological age is an estimate of how old your body acts, from your blood markers.
Three common tests: a comprehensive metabolic panel (CMP), a complete blood count with differential (CBC), and a high-sensitivity CRP (hs-CRP).
Together they give all nine markers.
Phenotypic Age was built on 9,926 US adults and checked on 6,209 more, where it was a strong predictor of disease and death.
It's an estimate for one day, not a diagnosis.
No.
Your results stay in this browser, and nothing is sent to my server.
Your plan file is yours to keep.
I did.
I'm Navid Moazzez, and I made the biological age calculator as one of my free tools on navid.me, from my own Longevity OS routine.
Read more about me.
Navid Moazzez
AI business strategist & AI OS builder
Navid Moazzez helps creators and founders master AI and build their own AI Operating System (AI OS) to automate their business and life.
Navid.me is reader-supported. When you buy through links on this site, I may earn an affiliate commission. Learn more.
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