Age Calculator
Find your exact age in years, months and days from your date of birth.
Age Calculator
Formula
Age is calculated by finding the full calendar difference between the date of birth and the target date, accounting for varying month lengths.
Examples
- Born January 15, 1990 → as of today: 36 years, X months, X days
- Born June 3, 2000 → as of December 31, 2025: 25 years, 6 months, 28 days
How to Use
- Enter your date of birth.
- Optionally enter a different "as of" date (defaults to today).
- Click Calculate to see your exact age.
Frequently Asked Questions
Can I calculate someone else's age, like a pet's or a document's?
Yes — enter any start date and it will calculate the elapsed time to today or any date you choose.
Why does the day count sometimes look different from what I expect?
The calculator accounts for actual month lengths (28–31 days), so results are precise rather than using a flat 30-day month.
Is my date of birth stored anywhere?
No — the calculation happens entirely in your browser and nothing is saved or sent to a server.
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