Tool
Age Calculator — Exact Age in Years, Months, Days
Enter a date of birth (and optionally a reference date) to see the exact age broken down by years, months, days, plus totals in days, weeks, and hours.
How age is calculated
This calculator follows the calendar method most countries use for legal age: you turn N years old on the anniversary of your birth, with months and days counted from there.
Frequently asked questions
Why is the day count different from years × 365?
Years vary between 365 and 366 days (leap years), and months vary from 28 to 31 days. The day count is the exact elapsed-day total.