Pick a birth date to see the result instantly.
Find Your Exact Age in Seconds
Enter a birth date to instantly see the age in full years — the same "international age" used on official documents — along with total months, total days lived, and how many days remain until the next birthday. Everything runs in your browser, so no birth date ever leaves your device.
🎂 Great For
- Checking the exact age required for a form or application
- Working out a child's age in months for a growth chart
- Counting down the days to your next birthday
- Verifying an age-based eligibility cutoff
📋 How to Use
- Pick a date of birth
- Leave "As of" as today, or pick another reference date
- The age, total months, and total days appear instantly
- Press "Copy result" to copy it as text
Frequently Asked Questions
Is this the "international age" or "Korean age"?
This tool always shows international age — the number of full years since your birth date, which is how age is now legally counted in Korea (만 나이) and most other countries.
Can I calculate age as of a past or future date?
Yes. Change the "As of" field to any date you need — useful for figuring out how old someone was (or will be) on a specific day, like an event or a contract date.
What happens if I enter a future birth date?
A warning appears and no result is shown, since a birth date can't come after the reference date.
Is my birth date stored anywhere?
No. The calculation happens entirely in your browser and nothing is saved or sent anywhere.