Biological Age Estimator - Lifestyle-Based Age Calculator

How to use this tool

Enter your chronological age and key lifestyle measurements.
The estimator calculates a biological age adjustment based on your inputs.
Review the factor breakdown to see which habits add or remove years.

Biological vs. chronological age

Chronological age is the time since birth. This page’s “biological age” is a simplified lifestyle estimate calculated from chronological age, BMI, systolic blood pressure, exercise days, smoking status, sleep, diet quality, and alcohol intake. It does not measure your cells, run a lab test, or compare you with a biological-age cohort.

How the lifestyle estimate is calculated

The estimator adds the fixed year adjustments in the table to the age you enter, rounds the total to the nearest whole year, and keeps the displayed result at 18 or older. The adjustments are simple product rules, not weights derived from a validated clinical model. For example, choosing 5 exercise days per week contributes −3 years in this heuristic; it does not claim that this input changes anyone’s health or lifespan by that amount.

The controls can be useful for seeing how the published arithmetic responds to different entries or for organizing questions to discuss with a health professional. If you do not know a value, use an appropriate measurement or leave it at the default rather than treating the resulting number as a personal health assessment. BMI, blood pressure, exercise, sleep, diet, smoking, and alcohol are the only scored lifestyle inputs; the model does not assess medications, diagnoses, family history, genetics, stress, or social circumstances.

Year adjustments used by this tool

These are the complete factor weights used in the live estimate. A zero adjustment still appears in the factor list so that every scored input is visible. The table describes the calculator’s arithmetic only and should not be read as a ranking of health risks.

Factor	Input range	Year adjustment
BMI	Below 18.5 18.5 to under 25 25 to under 30 30 to under 35 35 or higher	+ 1.5 years -1 year + 2 years + 4 years + 7 years
Systolic blood pressure	Below 120 mmHg 120 to under 130 mmHg 130 to under 140 mmHg 140 mmHg or higher	-1 year 0 years + 2 years + 5 years
Exercise	0 days/week 1–2 days/week 3–4 days/week 5 or more days/week	+ 4 years + 1 year -1 year -3 years
Smoking	Never smoked Former smoker Current smoker	-1 year + 2 years + 8 years
Sleep	Under 6 hours/night 6 to under 7 hours/night 7–9 hours/night More than 9 hours/night	+ 3 years + 1 year -1 year + 1 year
Diet quality	1 — Poor 2 — Below average 3 — Average 4 — Good 5 — Excellent	+ 2 years + 1 year 0 years -1 year -2 years
Alcohol	7 or fewer drinks/week 8–14 drinks/week More than 14 drinks/week	0 years + 2 years + 5 years

Measures and methods not included

Resting heart rate, grip strength, waist-to-height ratio, body-fat percentage, glucose tests, and other measurements sometimes discussed in healthy-aging material do not affect this score. Their absence is intentional: the form does not collect them, so this page should not suggest that it evaluates them. Likewise, stress and strength-training sessions are not separate inputs.

Lab-based methods such as DNA methylation clocks or blood-marker models use different data and calculations. They are outside this lifestyle estimator, and results from those methods are not interchangeable with this page’s simple year adjustment. No blood, DNA, or other tool input is sent to a server; the entered lifestyle values are saved locally in your browser.

Frequently asked questions

What is biological age?

Biological age is a term used for different estimates of physiology. This tool uses it as a label for arithmetic that adds fixed lifestyle adjustments to chronological age; it does not measure how old your body or cells are.

Is this a medical assessment?

No. This is a non-validated lifestyle heuristic, not a diagnosis, clinical measurement, or personal lifespan prediction. It does not use PhenoAge, an epigenetic clock, or blood tests. Consult a healthcare provider for health concerns or decisions.