🎂 Age Calculator

Free online age calculator

Enter a date of birth and this age calculator shows your exact age in years, months and days, together with the total number of days you have been alive. It is useful for filling in forms, checking eligibility for a school, job or program, planning birthdays and anniversaries, or just satisfying your curiosity. The calculation runs in your browser, and your date of birth is never stored or sent anywhere.

How to use it

1. Click the date field and choose your date of birth, or type it in.
2. Click Calculate age.
3. Read your age in years, months and days, plus the total days.

The result is based on today's date on your device. To find the age on a different date, such as a future deadline, calculate the difference by hand from the result or use a date difference tool.

How age is calculated

The tool counts the full years since your birth date, then the remaining full months, then the leftover days. Calendar months have different lengths and leap years add an extra day to February, so the calculator works with real calendar dates and not with an average year length. The total days figure is the exact number of calendar days between your birth date and today.

Leap year birthdays

If you were born on February 29, your birthday occurs only in leap years. In other years, many places treat your birthday as February 28 or March 1 depending on local rules. This calculator counts real days, so it works correctly either way, but legal definitions can differ by country.

Good to know

• Some countries count age differently. For example, traditional systems in parts of East Asia count a baby as one year old at birth. This tool uses the international method.
• For legal or official purposes, such as contracts or immigration, always check the rules that apply to you.
• You can use the result to work out milestones, like the day you reach 10,000 days old.

Frequently asked questions

Does the calculator account for leap years?

Yes. It uses real calendar dates, so extra leap days are included in the total.

Why do I get a message about the date being in the future?

The date you entered is later than today. Check the day, month and year.

Can I calculate someone else's age?

Yes. Enter their date of birth. Nothing is saved, so the information stays private.

Why is the number of days different from other websites?

Some sites include or exclude the birth date itself, or use a different time zone. This tool counts the days between the two dates on your device's calendar.