Age Calculator
Find the exact age between two dates, down to the day.
Defaults to today.
Age
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–
- Total days lived–
- Total weeks–
- Total months–
- Next birthday in–
How age is calculated
We count whole years, then whole months from the last birthday, then remaining days — the same way you'd count age by hand on a calendar. Total days is the exact number of calendar days between the two dates.
Yes. Because the calculation works from actual calendar dates rather than a fixed 365-day year, leap years are automatically handled correctly, including for people born on February 29.
Yes — enter any start date (a purchase date, an anniversary, a founding date) and this works the same way, though the "next birthday" line is only meaningful for people.