Age Calculator
Exact age in years, months and days from any date — works for birthdays, anniversaries or project start dates.
Calculate your exact age in years, months and days from your date of birth, plus total days, weeks and your next birthday. Handy for forms, documents and anyone who wants to know their precise age today.
Date math follows the Gregorian calendar, leap years included.
How to use the Age Calculator
- Pick your date of birth in the date field.
- The tool instantly shows your age in years, months and days.
- Check total days lived and the days until your next birthday.
Frequently asked questions
How is age calculated?
By comparing your date of birth with today's date, accounting for leap years and month lengths.
How old am I in days?
Enter your birth date and the tool shows total days, weeks and months lived.
Does it count leap years?
Yes. The calculator handles February 29 and leap years correctly.
How do I calculate age for a past or future date?
The tool uses today's date by default; use the date inputs to compute age as of any chosen date.