Birthday Countdown

Free Online Tool

Age Calculator

How old are you exactly? Enter your date of birth for a precise breakdown of your age in every unit of time.

Enter your date of birth to calculate

What Is the Age Calculator?

How old am I? How old are you? How old would your favorite writer or movie star be today?

The age calculator shows the time period between a date of birth (start date) and an end date (automatically set to today) in different units of time:

Age

Shown in whole years, months, and days

Age in Years

Your precise age in years (with decimals)

Age in Months

Total number of months since birth (with decimals)

7

Age in Weeks

Your age converted to weeks (with decimals)

Age in Days

Answers "How many days have I been alive?"

Age in Hours

Answers "How many hours old am I?"

Age in Minutes

Answers "How old am I in minutes?"

123

Age in Seconds

Answers "How many seconds have I lived?"

Days Until Birthday

Remaining days until your next birthday

How to Use the Age Calculator

01

Set your date of birth in the first field.

02

Set the date to calculate up to in the second field (default today).

03

Click the button to see the results.

04

Impatient for a birthday? Click the Days Until Birthday result to see your birthday countdown!

How to Calculate Age Manually

To determine a person's age accurately without a calculator, you need the birth date and current date. These steps work for age in most Western countries:

1Note today's date (day, month, year).
2Note the date of birth (day, month, year).
3Subtract the birth year from the current year.
4If the current month is before the birth month, or if it's the same month but the current day is before the birth date, subtract 1 from the result.
5The result is the age in years.

Some cultures calculate age differently. For example, some Asian countries traditionally consider a baby to be 1 year old at birth, not 0 years old. Leap years can also affect calculations, so our age calculator is the best way to get a precise answer.

Got Questions?

Frequently Asked Questions

How accurate is this age calculator?
It is accurate to the day. It calculates the exact number of complete years, months, and days between your date of birth and the selected end date.
How many days have I been alive?
Enter your date of birth and click Calculate. The "Age in Days" field shows the exact number of days you have been alive.
How many seconds old am I?
The calculator multiplies your total days alive by 86,400 (seconds per day) to give you your age in seconds.
What is the Indian Legal Age calculation?
Under the Indian Majority Act (1875), the day of birth counts as the first day. So each legal age is attained on the day before the birthday — one day earlier than in most Western systems.
Can I calculate someone else's age?
Yes. Just enter any date of birth in the first field and any reference date in the second field to calculate the age between those two dates.

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