Age Calculator
Find your exact age in years, months and days — plus total weeks, days, hours and a countdown to your next birthday.
defaults to today
Your age26y 6m 11d
In months318
In weeks1,384
In days9,689
In hours232,536
Next birthday in173 days
🔒 Calculated on your device — nothing is sent anywhere
How to use the age calculator
- Enter your date of birth.
- Set the target date. It defaults to today; change it to find your age on any date.
- Read your results. Exact age plus fun totals update instantly.
Frequently asked questions
How is my exact age calculated?
We compare your date of birth to the target date and work out the difference in complete years, months and days, adjusting for month lengths and leap years.
Can I calculate age on a future or past date?
Yes. Change the second date to any day — it defaults to today, but you can set it to a past or future date to find age at that point.
What are total days and weeks?
These show your whole life span in different units — total days lived, weeks, months and hours — which many people find fun to see.
Is my birth date uploaded?
No. The calculation runs entirely in your browser and your date of birth is never sent anywhere.