Age Calculator
Calculate your exact age from a birth date.
Calculating…
Calculated as of today, ….
Use on any page (bookmarklet)
Want Age Calculator without leaving the page you're on? Drag the button below to your bookmarks bar, then click it on any website to open Age Calculator right there — it runs entirely in your browser.
Use responsibly: a bookmarklet runs on whatever page you click it on. Avoid sensitive sites such as online banking, payment, or healthcare pages — you run it at your own risk. Everything is processed locally and no data is sent anywhere. See our Terms.
- Show your bookmarks bar if it's hidden — Ctrl+Shift+B (⌘+Shift+B on Mac).
- Drag the button above onto the bookmarks bar.
- Open any website and click the bookmark — the Age Calculator panel appears in the top-right corner. Use ✛ to move it between corners, or ›/‹ to tuck it against the edge and pull it back out.
- Click the bookmark again (or the ✕) to close it.
Note: a few sites with strict security policies may block bookmarklets.
Examples
Age from a birth date
Input
Born 2000-01-01
Output
e.g. 25 years, 5 months, 23 days · ~9,300 days
Next birthday
Input
Born 1990-12-25
Output
Shows days remaining until December 25
About this tool
This free online age calculator works out your exact age from your date of birth. It shows your age in years, months, and days as of today, your total days and weeks lived, the day of the week you were born, and how long until your next birthday. Everything runs in your browser with no upload.
How to use
- Enter your date of birth.
- Read your age breakdown and totals.
- Check the countdown to your next birthday.
Common uses
Finding your precise age for forms and applications, working out how many days you've been alive, checking age eligibility, and counting down to the next birthday.
Frequently asked questions
How do I calculate my exact age?
Enter your date of birth and the calculator shows your age in years, months, and days as of today, plus your total days lived and the weekday you were born on.
Is this age calculator free?
Yes — it's a completely free online age calculator with no sign-up.
Does it count leap years correctly?
Yes. It uses real calendar months and years, so February 29ths and varying month lengths are handled accurately.
Can it tell me when my next birthday is?
Yes. It shows how many days remain until your next birthday, and wishes you a happy birthday if it's today.
What day of the week was I born?
The calculator shows the weekday for your date of birth alongside your age.
Is my birth date uploaded anywhere?
No. Everything is calculated in your browser with no upload, so your date of birth stays private.
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