Age calculator: years, months and days
Enter your date of birth to see your age in years, months and days, the number of days you have lived, and how long until your next birthday.
How age is calculated
We subtract your date of birth from today: full years first, then full months, then the days left over. If your birth day has not yet come round this month, we borrow the previous month at its real length, whether 28, 30 or 31 days. This is the method used on official documents.
What the calculator shows
- Your age in years, months and days.
- Your total age in months, weeks, days and hours.
- The number of days until your next birthday.
- The day of the week you were born.
Born on 29 February
If you were born on 29 February, your actual birthday comes once every four years. In other years the calculator counts the year as complete on 1 March, which is the rule most systems follow.
Everything is calculated in your browser. Your date of birth is not sent to any server.
Frequently asked questions
How do I work out my exact age?
Enter your date of birth and press Calculate. Your age appears in years, months and days, counted up to today.
How do I find my age in the Hijri calendar?
Your Hijri age is higher than your Gregorian age because the Hijri year is shorter. Use the Hijri age calculator on this site for the exact figure.
Is my data stored?
No. The calculation runs in your browser. The date of birth you enter never leaves your device and is not stored by us.