Age Calculator
Calculate exact age in years, months and days from a date of birth. See how many days, weeks and months someone has lived and how many days are left until their next birthday.
How to calculate age
To calculate age, subtract the birth year from the current year. If this year's birthday has not happened yet, subtract 1. The remaining months and days are counted from the last birthday up to the reference date.
Age calculation example
Someone born on August 15, 1990 was 36 years, 1 month and 29 days old on October 14, 2026.
When to use an age calculator
- Check minimum or maximum age requirements for exams, jobs or applications
- Fill in registrations, enrollments and forms
- Work out a baby's age in months and days
- Find out how many days are left until your next birthday
Frequently asked questions
How do I calculate age from a date of birth?
Subtract the birth year from the current year, then subtract 1 if this year's birthday has not happened yet. The calculator does this automatically and also shows the months and days.
How is age calculated for someone born on February 29?
In non-leap years, the calculator treats February 28 as the birthday.
Can I calculate age on a specific date?
Yes. Change the reference date to find out how old someone was or will be on any day, such as the date of an exam, an application deadline or a trip.