How to use the age calculator
Enter a date of birth and the date you want to measure to. It defaults to today. The calculator shows the exact age in years, months and days, plus totals in months, weeks and days.
How age is calculated
The calculator counts complete years first, then complete months, then the remaining days, borrowing days from the previous month when needed. This matches how age is normally stated.
Frequently asked questions
How many days old am I?
Enter your date of birth and the calculator shows the total number of days you have lived.
How are leap-year birthdays handled?
For a February 29 birthday, the next birthday in a non-leap year falls on March 1.