Clinical PhenoAge
PhenoAge Calculator: biological age from blood tests
Nine routine blood markers plus your age – transparently calculated, without sign-up and directly in your browser.
Your values stay on your device
- Free, no sign-up and no hidden costs
- All common lab units with automatic conversion
- No storage and no transmission of your health data
- Clinical PhenoAge – not a DNA methylation test
Note: this calculator is an educational tool and does not replace medical diagnosis or treatment.
My PhenoAge: Benedikt Keck's blood panel as a worked example
What does a PhenoAge calculation with real blood values look like? For this worked example I used my own blood panel from 19 September 2025. My chronological age at that point was 34.57 years. The Levine/Liu model estimates a PhenoAge of 20.17 years.
My PhenoAge
20.17
years – at a chronological age of 34.57 years
- Chronological age
- 34.57 years
- PhenoAge
- 20.17 years
- Age difference
- −14.39 years
- Markers used
- 9 / 9
mathematically about 14 years and 5 months younger than the chronological age – a model-based estimate, not a medical statement about health status.
The example values are filled into the form locally in your browser only.
Calculator and methodology built and reviewed by Benedikt Keck, longevity expert at Longevity Hackers.
More about Benedikt KeckBortz Age calculator as a second method
Last reviewed: August 2026
0 of 9 values entered.
Your inputs stay in your browser. No health data is stored or transmitted.
Real-world example
Benedikt Keck: my PhenoAge from nine blood markers
For this worked example I only use values from one and the same blood draw on 19 September 2025, so you can reproduce the result in the calculator yourself.
- Chronological age at blood draw
- 34.57 years
- PhenoAge
- 20.17 years
- Difference
- −14.39 years
- In plain words
- roughly 14 years and 5 months younger in the model
| Albumin | 46 g/L |
|---|---|
| Creatinine | 87 µmol/L |
| Glucose | 5.3 mmol/L |
| hsCRP | 0.6 mg/L |
| Lymphocytes | 42 % |
| MCV | 84 fL |
| RDW-CV | 11.2 RDW-CV (%) |
| Alkaline phosphatase | 92 U/L |
| White blood cells | 4.6 ×10⁹/L |
Benedikt's example data – replace it with your own values. Nothing is filled in until you click, and everything stays in your browser.
Only these nine markers belong to the original PhenoAge model. ApoA1, ApoB, hormones or vitamins are deliberately left out. Numbers mentioned elsewhere on this site come from other models or other blood draws and cannot be reproduced with this data set.
What is PhenoAge (phenotypic age)?
- PhenoAge combines your chronological age with nine routine blood markers.
- It is a population-based statistical model, not an individual measurement.
- No DNA test is needed for this calculator – a standard blood panel is enough.
- Clinical PhenoAge is not the same thing as DNAm PhenoAge from methylation data.
Which blood test markers you need for the calculator
You need exactly these nine lab values – plus your age on the day of the blood draw:
- Albumin
- Creatinine
- Glucose
- hsCRP
- Lymphocytes
- MCV
- RDW-CV
- Alkaline phosphatase
- White blood cells
How should I read the result?
- The result is a model estimate, not a diagnosis.
- Single values can shift with infections, hard training, medication, food intake and lab methods.
- Comparisons over time are most meaningful when lab, units and measurement conditions stay similar.
- The 5% calculations show model sensitivity, not a guaranteed treatment effect.
- Values outside the original age range of 20–84 years are extrapolations.
What does my phenotypic age mean?
What matters is not the absolute number but the gap to your chronological age. The ranges below describe model spans, not medical thresholds.
| Gap to chronological age | How to read it |
|---|---|
| more than 5 years younger | Your lab profile statistically matches a clearly younger age. Double-check that all nine values use the right unit. |
| −5 to +5 years | Within model uncertainty. Without a second measurement a gap this size cannot be interpreted meaningfully. |
| 5 to 10 years older | Notable. The usual drivers in the PhenoAge model are CRP, glucose, albumin and red cell distribution width (RDW). |
| more than 10 years older | Clearly notable. Discuss the underlying lab values with a doctor – not the calculator output. |
A single measurement says little. PhenoAge becomes informative across repeated draws at the same lab.
How the Levine PhenoAge formula is calculated
PhenoAge, DNAm PhenoAge and Bortz Age compared
Three terms that are often confused. This calculator computes the clinical PhenoAge from blood markers.
| Model | Data basis | Effort | What it tells you |
|---|---|---|---|
| Clinical PhenoAge (this calculator) | 9 routine blood markers, Levine 2018 / Liu 2018 | Standard blood panel, calculation free | Age-equivalent mortality risk from inflammation, metabolism, liver, kidney and blood count. |
| DNAm PhenoAge | DNA methylation at 513 CpG sites | Specialised lab test, paid | Epigenetic age estimate. Not interchangeable with the clinical PhenoAge despite the shared name. |
| Bortz Age | Up to 25 blood markers, Bortz et al. 2023 | Extended blood panel, calculation free | Broader marker base, also works with incomplete panels. |
Results from different models are not directly comparable – it is more useful to follow one model consistently over time.
Related calculators
PhenoAge only needs nine standard markers, so it is quick to run. The Bortz calculator uses up to 25 markers and also works with incomplete panels. Both answer the same question from a different data base – comparing the two is often more informative than a single number.
Bortz Age calculator
Up to 25 blood markers, works with incomplete panels and shows each marker's contribution.
Calculate biological age from up to 25 blood markersAbout Benedikt Keck
Who is behind Longevity Hackers, which markers get measured and how the Longevity World Cup fits in.
Go to the about pagePhenoAge – frequently asked questions
Medical note
This calculator is for information and scientific context only. It does not replace medical diagnosis or treatment. Do not change medication, diet or supplements based on this result alone.