Enter your date of birth and click Calculate Age. The calculator instantly shows your exact chronological age in years, months, and days as of today, plus total days lived and your next birthday countdown.

Age Calculator – Calculate Your Exact Age

Q: How do I calculate my exact age in years, months, and days?

Enter your birth date. The calculator counts full years, then full months, then remaining days using real calendar month lengths, and also shows total days lived, completed weeks, and the weekday of your next birthday.

Q: How old am I if I was born in 2000?

The year alone is not enough; the month, day, and the current date matter. Enter your full date of birth in the calculator above for your exact age in years, months, and days.

Q: Can I calculate a child's age in months and days?

Yes. The years-months-days breakdown and total days lived are ideal for tracking young children's milestones — for example, parents often use it to check a child's exact age for school admission cut-off dates.

Q: How does the calculator handle February 29 birthdays?

Birthdays for 29 February are observed on 28 February in non-leap years, both for the age result and the next birthday countdown.

Q: How is total age in days calculated?

It is the elapsed day count from the birth date to today, compared at UTC midnight so time zones cannot shift the result. The birth day counts as day zero; the inclusive count is one day more.

How old am I today? Find your exact chronological age in years, months, and days with DateNook’s free online age calculator. Enter your date of birth below — this date of birth to age calculator instantly shows how old you are today, plus your total days lived, next birthday, and a live birthday countdown.

Instant and accurate
No signup required
Your date stays private

Date of Birth

Use the date picker, or type the date as YYYY-MM-DD.

ExactYears, months & days

PrivateNo birth date stored

FreeNo account or payment

InstantResults in one click

How to use this age calculator

Enter your birth date
Type your date of birth as YYYY-MM-DD or pick it from the calendar.
Click Calculate Age
Your chronological age is computed instantly, right in your browser.
Read your exact age
See years, months and days, total days lived, and your next birthday countdown.

Counting method: dates are compared at UTC midnight, so time zones and daylight saving changes never shift the answer. “Total days lived” counts elapsed days (the birth day is day 0); add 1 for the inclusive count of both endpoints. A February 29 birthday is observed on February 28 in non-leap years. Everything runs in your browser — your dates are never sent anywhere.

Understanding your results

This online chronological age calculator gives you more than a single number. Exact age is your age in completed years, months, and days as of today. Total days lived is the elapsed day count since your birth (the birth day counts as day 0), and the inclusive count is shown alongside it. Completed weeks converts the same span into weeks plus remaining days. You also get your next birthday date, the weekday it falls on, and a live countdown in days.

A note on February 29 birthdays

If you were born on February 29, this age calculator observes your birthday on February 28 in non-leap years — for the age result, the next-birthday date, and the countdown alike. The rule is applied consistently so the answer is never a surprise.

Frequently asked questions

How old am I today?

Enter your date of birth in the age calculator above and click Calculate Age. You will instantly see your exact chronological age in years, months, and days as of today, along with total days lived and your next birthday countdown.

How do I calculate my exact age in years, months, and days?

Enter your birth date and the calculator does the calendar math for you: it counts full years first, then full months, then the remaining days, using real month lengths and leap years. The result also includes total days lived, completed weeks, and the weekday of your next birthday.

How old will I be in 2030?

This calculator shows your age as of today. Your age on any day in 2030 depends on your full birth date — for example, someone born on 1 January 2000 turns 30 on 1 January 2030. Enter your date of birth above to see your exact age right now.

How old am I if I was born in 2000?

The year alone is not enough for an exact answer, because the result depends on your birth month and day and on today’s date. Enter your full date of birth in the calculator above for your precise age in years, months, and days.

Can I calculate a child’s age in months and days?

Yes — this child age calculator mode is built in. The years-months-days breakdown and total days lived are ideal for tracking young children’s milestones, and many parents use the exact day count for school admission cut-off dates and vaccination schedules.

How does the calculator handle February 29 birthdays?

A February 29 birthday is observed on February 28 in non-leap years. This rule is applied consistently to the age result, the next-birthday date, and the countdown.

How is total age in days calculated?

Total days lived is the elapsed day count from your birth date to today, compared at UTC midnight so time zones and daylight saving cannot shift the result. The birth day counts as day 0; the inclusive count (both endpoints) is shown separately and is exactly one day more.

Related calculators: Days Between Dates · Weeks Between Dates · Days From Today

Age calculator