How to use the Age Calculator
Enter the date of birth and the result appears straight away. Everything runs in your browser, so nothing you type is uploaded.
How it works
Calendar difference between date of birth and today
Examples
- Born 1 January 2000, on 10 November 2026
26 years, 10 months and 9 days
- Born 29 February 2000 (leap day), on 10 November 2026
26 years, 8 months and 12 days
- Born 15 June 1985, on 10 November 2026
41 years, 4 months and 26 days
Limitations and assumptions
Uses the device date and calendar date arithmetic; not a medical or identity tool. Calendar anniversaries are clamped to the last valid day of shorter months (including February for leap-day birthdays).
Frequently asked questions
How is age calculated?
Count completed years from the date of birth, then the remaining whole months and days.
How are leap-day birthdays handled?
Calendar arithmetic is used; the birthday falls on 28 or 1 March in non-leap years depending on convention.
Can I find the difference between two dates?
Yes, use the date difference calculator for any two dates.
Is my birth date stored?
No. It stays in your browser.