Age Calculator
Calculate exact age in years, months, and days from a birth date.
This Age Calculator computes exact age in years, months, and days from a date of birth, comparing it against today's date by default or any other date you choose — useful for eligibility checks, forms, or curiosity. Pick a birth date and the exact age updates automatically in your browser.
How to use
- 1Pick a date of birth.
- 2Optionally pick a different "as of" date — it defaults to today.
- 3The exact age in years, months, and days updates automatically.
Frequently asked questions
How is age calculated here?
It counts the full elapsed years, months, and remaining days between the birth date and the comparison date — the same precise breakdown you'd get counting on a calendar by hand, done automatically.
What is this used for?
Checking exact age for an eligibility requirement, filling in an age field on a form precisely, or simply satisfying curiosity about exactly how old someone is down to the day.
Can I calculate age as of a date other than today?
Yes — the "as of" date defaults to today but can be changed to any other date, useful for calculating age at a specific past or future point.
Is any date information stored?
No. The calculation happens locally in your browser and nothing you enter is saved or transmitted.