Age Calculator
Enter a date of birth to calculate exact age in years, months and days. You can calculate age as of today or another date.
Calculate exact age
How to use the Age Calculator
- Enter the date of birth or starting date.
- Choose the date on which you want the age calculated.
- The calculator compares the calendar dates and adjusts for whether the birthday has already occurred in the selected year.
- Results include years, months and days plus useful total-day and total-week values.
Examples
Age today
Select a birth date and leave the Age on field set to today to calculate current age.
Age on another date
Change the Age on date to determine how old someone was or will be on a particular date.
Frequently asked questions
How is exact age calculated?
Exact age is based on calendar years, months and days rather than simply dividing total days by 365.
Can I calculate age on a past or future date?
Yes. Select any valid Age on date that occurs on or after the date of birth.
Does February 29 affect age calculations?
Leap-day dates are handled using calendar-based date arithmetic.
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