What Is an Age Calculator?
An age calculator determines the exact amount of time that has passed since a birth date or another selected date.
How Age Is Calculated
Age is calculated by comparing a birth date with the current date and accounting for years, months and days.
Why Exact Age Matters
Exact age calculations are useful for school registration, legal documents, medical records, insurance applications and retirement planning.
Age in Years, Months and Days
A precise age calculation shows not only full years but also the remaining months and days after the last birthday.
Practical Example
If someone was born on January 10, 2000 and today's date is January 20, 2026, the age is 26 years and 10 days.
Leap Years and Month Lengths
Accurate age calculations must account for leap years and months with different numbers of days.
Common Uses for Age Calculators
People use age calculators for personal records, birthdays, eligibility checks, applications and planning.
Using This Age Calculator
Enter a date of birth to instantly calculate age in years, months and days.