Longevity

Biological Age Calculator

Knowing your physiological age helps you understand more about your body's ageing process than your birthday ever could.

Enter your blood test values

Values from a standard blood panel. All fields are required. The calculation runs entirely in your browser.

Albumin (g/dL)

Dissolved plasma proteins including hormones and signalling molecules.

Creatinine (mg/dL)

Kidney-cleared waste product. Elevated levels may indicate kidney issues; exercise can also raise it.

Glucose (mg/dL)

Blood sugar marker associated with Type 2 diabetes risk and insulin sensitivity.

C-reactive Protein (CRP) (mg/L)

Systemic inflammation marker. Elevated CRP is associated with increased disease risk.

Lymphs (Lymphocyte) (%)

Most prevalent type of white blood cell, expressed as a percentage of total white blood cells.

Mean Cell Volume (MCV) (fL)

Average size of red blood cells.

Red Cell Distribution Width (RDW) (%)

Measures the variation in red blood cell size (standard deviation of MCV).

Alkaline Phosphatase (ALT) (U/L)

Elevated levels may indicate liver disease including hepatitis and liver cancers.

White Blood Cells (WBC) (10³ cells/mL)

Total count of white blood cells across all types.

Age (years)

Your chronological age.

Frequently asked questions

What is biological age?: Biological age measures how well or poorly your body is functioning relative to your actual chronological age. It reflects various biomarkers that indicate overall health status — and unlike your birth date, it can change in response to your lifestyle choices.
How does the calculator work?: The calculator uses the biomarker values you provide to estimate your phenotypic (biological) age based on the scientific model described in "An epigenetic biomarker of aging for lifespan and healthspan" by Levine et al. (2018). The calculation runs entirely in your browser — no data is sent to any server.
Is the calculation accurate?: The calculator provides a scientifically informed estimate rather than an absolute measure. It relies on population-level research and cannot account for all individual variations or genetic factors. Use it as a directional indicator, not a clinical diagnosis.
How can I use phenotypic age information?: Your phenotypic age helps you make more informed health decisions and serves as a motivating benchmark for lifestyle improvements. Tracking it over time — for example, after dietary or exercise changes — lets you see objective progress.
Can I lower my biological age?: Yes. Biological age can be positively influenced by improving your diet, increasing physical activity, managing stress, ensuring quality sleep, and addressing specific biomarker deficiencies. Many of these changes are reflected in the biomarkers this calculator uses.
How often should I recalculate?: We recommend recalculating annually, or after any significant change in your health habits or a new blood test. More frequent recalculation may not be meaningful given the rate at which biomarkers change.
What if my result is higher than my chronological age?: A higher phenotypic age suggests there may be room for lifestyle improvements that could positively affect your health trajectory. Consider consulting a qualified healthcare professional to interpret your specific biomarker values.
Can I reverse ageing through habit changes?: While chronological ageing cannot be reversed, it is possible to positively influence your biological age and overall health. Consistent lifestyle improvements — particularly in nutrition, sleep, and exercise — are associated with measurable improvements in the biomarkers this tool uses.