Calculate calendar age in years, months and days.
Preparing calculator…
Time zones, leap days and local rules can affect boundary dates. The tool counts complete calendar years, months and days.
Not a diagnosisFor general health education and estimation only. It does not diagnose a condition and is not treatment, medication, diet or training advice.
target date − birth date (calendar difference)Calendar-age calculation between two valid Gregorian dates.
Legal age, insurance age and traditional age systems may use different rules.
Input accuracy, measurement technique, rounding and individual variation all affect the result. Internal precision is retained and only displayed values are rounded.
Medical and legal forms should follow identity documents and the relevant authority rules.