How Old Is Your Body,Really?

Biological age is an estimate of how old your body appears to be based on measurable health markers, rather than how many years you have lived. Two people born on the same day can have biological ages a decade apart depending on body composition, blood pressure, metabolic markers, inflammation, fitness and sleep.

Each marker you enter is converted into a 'matched age' — the age at which your value would be typical, or the number of years the deviation from a clinical target is worth. Your biological age is the weighted average of those matched ages, adjusted by a bounded lifestyle modifier for activity and sleep. Reference distributions come from NHANES 2017–2018 (US CDC), stratified by age band and sex.

No questionnaire-based calculator can match an epigenetic clock measured in a lab. This one is a transparent statistical estimate: with only height, weight and resting heart rate it is a rough indicator; adding blood pressure, waist and blood work raises the confidence level shown next to your result. Treat it as a directional health signal, not a diagnosis.

No. The calculator works with basic measurements alone and will tell you that confidence is low. Blood pressure and waist circumference cost nothing to measure at home and already move the estimate into the medium confidence band.

Most of the markers used here are modifiable. Losing visceral fat, bringing blood pressure under 120/80, improving glycaemic control, reducing inflammation, correcting vitamin D deficiency, training regularly and sleeping 7–9 hours all push the estimate down. The result screen shows your 'optimal age' — where you would land if every marker reached its clinical target.

Yes. The entire calculation runs client-side in JavaScript. Nothing you type is transmitted, stored or logged, there is no account, no cookies and no analytics tracking of your inputs.

Population distributions come from NHANES 2017–2018 (National Health and Nutrition Examination Survey, US CDC) for body composition, waist, blood pressure, resting heart rate, glucose, cholesterol, triglycerides, HbA1c, hs-CRP and vitamin D. Clinical targets come from WHO, the ACC/AHA hypertension and cholesterol guidelines, NICE and the Endocrine Society.

No. MyAgeScore is an educational tool. It does not diagnose, treat or prevent any condition. If a marker looks abnormal, discuss it with a qualified healthcare professional.