Age is the difference between your date of birth and the current or reference date. The calculation accounts for leap years and varying month lengths to give an accurate result in years, months, days, hours, minutes, and seconds.
Your age in months is used in medical contexts for infants. Age in days is used for legal and insurance calculations. The total number of days, hours, and minutes you have lived gives interesting perspective on time.
Western countries increase age on the birthday. Some East Asian traditions consider a person one year old at birth and add a year on the lunar new year. This calculator uses the internationally standard Western method.
Exact age in months or days is important for medical appointments, insurance eligibility, retirement planning, and age-restricted programs. Many financial milestones are tied to specific age thresholds.