Age calculator
Date & time
Age calculator
Find your age and days since birth
Example values are filled in. Replace them with your own.
Example calculation
On 2026-10-11, the completed age is 36 years.
Age
36 years
Elapsed days
13,267 days
Completed age increases on each birthday, rather than at the start of a calendar year.
See formula and assumptions
Subtract birth year and adjust for an upcoming birthday. Leap-day birthdays increment on March 1 in non-leap years.
- Date of birth
- Choose a date from the calendar.
- Reference date
- Choose a date from the calendar.