Time tools
Exact Age Calculator
Calculate completed years, months, days, and total days lived from a birth date.
Exact age is calculated in complete calendar years first, followed by remaining months and days. Dividing total days by 365 is wrong because leap years and month lengths vary. This tool returns both a readable years/months/days age and total elapsed calendar days.
Time tools
A birth date after the target date is rejected. Set the target to today for current age. Inputs are plain dates and no identity information is read or uploaded.
Frequently asked questions
Is this completed age?
Yes. It reports internationally used completed age: the number of full Gregorian years already lived.
How are February 29 birthdays handled?
Gregorian calendar arithmetic applies the correct constraint based on whether the target year is a leap year.