PhenoAge Calculator
Estimate your phenotypic age from nine routine blood biomarkers and chronological age. Review the result, understand the age gap, and keep a private local history of repeat calculations.
Your age & biomarkers
Complete all 10 fields using the units shown.
Your PhenoAge result
Calculated from the values you enter below. Results are estimates, not a diagnosis.
Enter your chronological age and nine biomarkers, then select Calculate PhenoAge.
Calculate to see a guide to your age gap.
Calculations run in this browser. Saved history stays in this browser on this device unless you clear it.
Reading the age gap
The gap is PhenoAge minus chronological age.
Saved history
Results are stored locally in this browser. Saving is optional.
Understand your PhenoAge
Clear context to help you interpret the estimate without overreading a single number.
01 What a lower biological age may reflect
PhenoAge combines chronological age with blood markers linked to inflammation, metabolism, blood-cell characteristics and organ function. A lower estimate can be encouraging, but it does not guarantee health or predict an individual’s lifespan.
For the most useful picture, interpret your result alongside your medical history, symptoms, other measurements and repeat results—not as a stand-alone health score.
02 Understanding the score and age-gap guide
PhenoAge is a research-derived estimate calculated from nine blood biomarkers and chronological age. Age gap is the estimate minus your chronological age. The labels below are a simple visual guide for this page, not medical risk categories or diagnostic thresholds.
| Age gap | Guide label | Interpretation |
|---|---|---|
| −8 years or lower | Much lower | Estimate is well below chronological age. |
| −5 to −7 years | Lower | Estimate is several years below chronological age. |
| −1 to −4 years | Somewhat lower | Estimate is below chronological age. |
| Near 0 | Similar | Estimate is close to chronological age. |
| +1 to +5 years | Higher | Estimate is above chronological age; consider context and trends. |
| +6 years or higher | Much higher | Estimate is notably above chronological age; review results with a qualified healthcare professional. |
Small gaps can shift with normal lab variation and rounding. There is no single age-gap cut-off that establishes whether a person is healthy or unhealthy.
03 Practical habits that support healthy aging
PhenoAge is not a direct measure of your habits. General health practices can support many of the systems represented by its biomarkers, though individual responses vary and not every marker is directly controllable.
04 PhenoAge vs. DNA and wearable-based measures
Different aging measures capture different biological or behavioral signals. Their numbers are not interchangeable, and none independently provides a complete measure of health.
Use DNA methylation data from a biological sample. Different clocks are trained for different outcomes and can vary in cost and interpretation.
Uses routine clinical blood markers and chronological age to estimate phenotypic age using a published research model.
Track behavior and signals such as activity, resting heart rate and HRV. These measures do not calculate the same score as PhenoAge.
05 Frequently asked questions
It is an estimate intended to describe aspects of physiological aging. Different algorithms use different inputs, so biological-age estimates from separate tools may not match.
The PhenoAge model was developed and evaluated in population research, but an individual result is not a precise prediction of future health or lifespan. Lab variation, acute illness, medications and unit-entry errors can affect interpretation.
Some inputs can change over time, but the score is not a treatment target and a change does not automatically mean health has improved. Focus on overall health and discuss abnormal blood results with a qualified professional.
Stress can affect health and behavior, and some blood markers can be influenced by illness and other short-term factors. This calculator cannot identify the cause of an individual result.
There is no universal interval. Follow your healthcare professional’s advice and, when comparing results, consider using comparable testing conditions and units.
There is no universal PhenoAge score that defines good health. Trends and the wider clinical picture are more informative than a single estimate.
Educational use only. This tool provides an estimate from values entered by you; it is not medical advice, diagnosis or a substitute for care. Reference ranges are illustrative and vary by laboratory, age and clinical context. Review lab results and health concerns with a qualified healthcare professional. © 2026 Runar Health LLC.