Age Calculator
Calculate your exact age in years, months and days from any birth date, right in your browser.
🔒 Processed locally in your browser
Loading…
How to use
- Enter your date of birth in the first field.
- Optionally change "Age as of" to a different date — it defaults to today.
- Your exact age in years, months and days updates instantly.
- Scroll down to see your total days lived and the countdown to your next birthday.
Features
- Exact age in years, months and days, with correct calendar-borrowing math
- Calculate age as of any date, not just today
- Shows total days lived and a countdown to your next birthday
- Dates are displayed using your language's date format
- 100% client-side — your dates never leave your browser
Frequently asked questions
How is the age calculated?
The calculator compares the year, month and day of your birth date and the "as of" date, borrowing a month or year when needed, so the result is your exact calendar age rather than an approximation based on dividing total days by 365.
Can I calculate my age on a future or past date instead of today?
Yes. Change the "Age as of" field to any date to see what your age was, or will be, on that date.
What happens if I was born on February 29?
In non-leap years your next birthday is calculated using your browser's standard date handling, which lands on March 1.
Is my date of birth uploaded anywhere?
No. Age Calculator runs entirely in your browser — your dates are never sent to a server.