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Age Calculator

Find your exact age in years, months and days from a date of birth, plus days to the next birthday.

Processed in your browser. Nothing you enter is uploaded.

Leave empty to use today's date.

Age is counted in complete years and months. A day missing from a month (such as Feb 29 in a non-leap year) counts as that month's last day, so a Feb 29 birthday is reached on Feb 28 in non-leap years.

How to use it

  1. Enter the date of birth.
  2. Leave the target date empty for today, or enter a date to calculate the age on that day.
  3. Read the age in years, months and days.
  4. Check the days until the next birthday.

Example

Age on a given date
Input:Born 2000-01-15, on 2024-03-10
Result:24 years, 1 month, 24 days

What does Age Calculator do?

Age Calculator gives an exact age in years, months and days from a date of birth, plus total days and the days until the next birthday.

How does Age Calculator work?

It works on calendar dates only, with no clock times or time zones, and counts complete months from the birth date. The calculation runs in your browser.

Is my data uploaded?

No. The dates you enter stay in your browser.

Which formats and inputs does Age Calculator support?

Inputs: A date of birth and an optional target date (today by default). Output: Age in years, months and days, total months, weeks and days, and the next birthday.

What are the limits and limitations of Age Calculator?

Limits: supported years 1000 to 9999. A day missing from a month, such as Feb 29 in a non-leap year, counts as that month's last day. The date of birth cannot be after the target date.

More questions

How are Feb 29 birthdays handled?

In non-leap years a Feb 29 birthday is reached on Feb 28.

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