Age Calculator

Find the exact age between a date of birth and today.

LEAP YEAR ACCURATE - MULTIPLE FORMATS - RUNS ON YOUR DEVICE

Your dates stay on your device

  • Leapyears
  • Y/M/Dformat
  • Totaldays
  • Privateby design
Specification

Age Calculator at a glance

Input formats
Date from a calendar picker
Output formats
Age in multiple formats
Maximum file size
Device memory
Batch
One age at a time
Quality control
Accurate leap year logic
Metadata handling
No data stored
Price
Free
Account required
No
How to

How to use Age Calculator

  1. 1

    Enter a Date of Birth

    Select a start date.

  2. 2

    Choose the "Age At" Date

    Select an end date.

  3. 3

    See the Result

    Read the calculated age.

Questions

Frequently asked questions

How does the calculator handle leap years?

The calculator correctly accounts for leap years (years divisible by 4, except for years divisible by 100 but not by 400). This ensures February 29th is handled accurately, providing a precise age calculation for any date range.

Is my date of birth saved or stored anywhere?

No. Your date of birth is used only for the calculation, which happens entirely within your web browser. The information is never sent to our servers and is gone as soon as you close the browser tab. Your privacy is fully protected.

Can I calculate the age of something other than a person?

Yes. The tool calculates the time duration between any two dates you provide. You can use it to find the age of a company by using its founding date, the age of a building from its completion date, or the time since any historical event.

Why is the 'total days' result different from the years/months/days breakdown?

They represent the same duration. 'Years, months, days' is a conventional format for age. 'Total days' is a raw count of full days passed. For example, '1 year' is the same as '365 total days' (or 366).

Can I calculate my age on a future date?

Yes. In the second field, labeled 'Age at the date of,' select any date in the future. The calculator will instantly show you how old you will be on that specific day, down to the exact number of years, months, and days.

Background

More Than Just Birthdays

The calculator provides an accurate age in years, months, and days. It correctly accounts for varying month lengths and leap years.

  • This tool can find the duration between any two dates, not just for calculating age. Use it for business anniversaries or historical events.
  • The result is shown in multiple formats. 'Years, months, days' is good for people, while 'total days' or 'total weeks' is useful for planning.

Full specification

Specification of the Age Calculator tool
Input formatsA date of birth selected from a calendar interface.
Output formatsAge displayed as text in multiple formats (e.g., years, months, days; total months; total days).
Maximum file sizeLimited only by your device memory
BatchNot applicable. The tool calculates one age at a time.
Quality controlCalendar month lengths and Gregorian leap-year rules are applied.
Metadata handlingNo file metadata is processed; entered dates remain in the current browser session.
PriceFree
Account requiredNo
Next step

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