TooldenTOOLDENCALCULATORSON-DEVICE
Age Calculator
Enter your date of birth to see your exact age in years, months and days, how many days you have been alive, and how long until your next birthday. Everything is computed in your browser.
HOW TO USE
- 1Pick your date of birth from the calendar on the left.
- 2Read your exact age broken down into years, months and days on the right.
- 3See how many total days you have been alive on the right.
- 4Check how many days are left until your next birthday on the right.
EXAMPLE
INPUT
Date of birth: 1 October 2000
OUTPUT
25 y, 10 m, 2 d Total days alive: 9,437 Next birthday: in 59 days
FAQ
How is my age calculated?
With exact calendar math: whole years, then whole months, then the remaining days. Leap years are handled correctly.
What if today is my birthday?
The next-birthday card shows "Today!" when your birthday falls on the current date.
Can I pick a date of birth in the future?
No — future dates are rejected with a validation message.
Does the total days match what other age calculators show?
Yes — it is the exact number of calendar days from your date of birth to today, which is the standard measure.