Age Calculator — Years, Months and Days

What you can do

• •Years, months, and days
• •Total days lived
• •Days until the next birthday
• •Custom “as of” date

How it works

1. 1

   Enter birth date

   Pick or type your date of birth.

2. 2

   Optional “as of” date

   Defaults to today.

3. 3

   Read age

   See years, months, days, and days until next birthday.

Common uses

• •Birthday age checks
• •Exact age for forms
• •Age in years months days
• •Age on a future or past date

Frequently asked questions

How precise is the age result?

Age is computed from real calendar dates as years, months, and days — no “every month is 30 days” shortcut — and leap years are handled. You can also set an “as of” date instead of today.

Does it show days until my next birthday?

Yes. Along with years, months, and days of age, the tool shows the total days lived and the days remaining until the next birthday from the “as of” date.

What happens with a 29 February birthday?

In a non-leap year the next birthday is treated as 28 February, so the countdown still lands in the right year rather than skipping to the next leap year.

Can I calculate age on a past or future date?

Yes. Change the “as of” date to any date on or after the birth date — useful for eligibility cut-offs and forms that ask for age on a specific day.

Age vs date difference?

Age Calculator is birth-date oriented and adds the next-birthday helper. Date Difference measures the calendar span between any two dates in either order.

Is my input uploaded?

No. Calculation runs in your browser. Values are not sent to NeedAnyTool servers or analytics.

Related tools

• Date Difference — Days Between Two Dates
• Basic / Simple Calculator Online
• Unix Timestamp Converter

Related guides

• Age calculator online guide