Age Calculator
Calculate age in years, months, and days from a birth date.
Tool workspace
Leave blank to use today.
Reference date defaults to today in your browser’s local calendar. Leap-day birthdays follow ordinary calendar month/day arithmetic.
How it works
Enter a birth date and optional reference date (defaults to today in your browser). The result is years, months, and days using ordinary calendar subtraction.
Leap-day births follow standard month/day arithmetic for the reference calendar. Empty birth date clears the result—no error.
Leap-day births follow standard month/day arithmetic for the reference calendar. Empty birth date clears the result—no error.
Examples
- Birth 2000-01-01 to 2026-01-01 → 26 years, 0 months, 0 days
- Leave reference blank to use today
Privacy
Privacy: this tool processes dates locally in your browser. We do not log or store what you enter. Login is not required.
FAQ
Is my birth date uploaded?
No. Age calculation runs entirely in your browser.
What timezone is used?
Calendar dates in your browser’s local context for “today”; Domain tests use UTC calendar dates.
Do I need an account?
No. All published tools work for guests without login.