Age Calculator
Enter birth date on Jenzzy for precise chronological age down to the day.
Inputs
Results
Enter values to see results.
Formula
Age = Reference date − Birth date
Borrow days/months when day-of-month hasn't occurred yet in the reference year.
Example
- Years: 35
- Months/days: 11 months, 7 days= 35y 11m 7d
Result: 35 years, 11 months, 7 days old
Frequently Asked Questions
Time of birth?
Date-only ignores hour/minute unless provided.
Leap day birthdays?
Feb 29 births often celebrate Feb 28 or Mar 1 in non-leap years.
Future dates?
Reference date must be on or after birth date.