Everyday Utilities

Exact Age Calculator

Calculate age in years, months, days, total days, and time until the next birthday.

✓ No complicated setup✓ English and Chinese✓ Processed locally

Tool workspace

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Age result

Your result will appear here after you run the tool.

How it works

How to use Age Calculator

Enter a birth date and, optionally, a comparison date in YYYY-MM-DD format for a detailed calendar age.

How to use

  1. 1

    Enter the birth date on the first line.

  2. 2

    Optionally add a calculation date on the second line; otherwise today is used.

Use cases

  • ✓ Check an exact age on a given date.
  • ✓ Find the number of days until a birthday.

FAQ

How are leap-day birthdays handled?

In non-leap years, February 29 is clamped to the last day of February for calendar calculations.