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DATES TOOL

Age Calculator

Calculate completed years, months and days at a reference date.

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  1. 01

    Add your input

    Choose a tool, enter values or select a file.

  2. 02

    Make it yours

    Adjust the options and run the action.

  3. 03

    Take the result

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Birthday age calculator online

Calculate completed age at a selected reference date. The chosen reference date matters; this is a calendar calculation rather than legal age eligibility advice.

How to use it

Enter Birth date (YYYY-MM-DD) or select Try example. Review Reference date. Select Run tool and inspect the result before copying or downloading.

Options and example settings

OptionChoices / valueExample default
Reference dateEnter a value2026-10-12

Worked examples

Calculate completed age at a selected reference date.

Worked example — Age Calculator

Settings: Reference date: 2026-10-12

Input:

1990-05-15

Output:

36 years, 4 months, 27 days

Choose the right tool

Age is evaluated at the reference date you supply. It is not the same as dividing a day difference by 365, particularly around leap days and month boundaries.

Limitations and common mistakes

  • The chosen reference date matters; this is a calendar calculation rather than legal age eligibility advice.

Frequently asked questions

How can I compute age from a birth date online?

Enter Birth date (YYYY-MM-DD) or select Try example. Review Reference date. Select Run tool and inspect the result before copying or downloading.

Where is my input processed?

The bundled tool processes input in your browser. It does not upload tool input to a conversion service. Other site plugins, analytics, advertising and browser extensions may have separate behavior.

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