Age Calculator
Calculate exact age in years, months, and days from a birth date.
Defaults to today.
Enter a birth date to calculate age.
About this tool
Find someone’s precise age on today or any as-of date. Useful for forms, eligibility checks, and milestones.
How to use
- Select the birth date.
- Optionally change the as-of date.
- Read years, months, and days.
Examples
- Verify 18+ eligibility.
- Age on a specific event date.
- Calculate age difference milestones.
Benefits
- Exact Y/M/D breakdown
- Custom as-of date
- Simple accessible UI
- No account needed
Frequently asked questions
How are months calculated?+
We walk calendar months carefully so month lengths and leap days are handled correctly.
Can the as-of date be before birth?+
If so, the tool will show an invalid range rather than a negative age.
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