Age Calculator
Exact age in years, months, days and hours from any birth date, plus a countdown to the next birthday. It runs entirely in your browser — no signup, no installation, and nothing you paste or drop leaves your device.
The age in years, months and days is calculated on the calendar, not by dividing days: from 29 February to 1 March is one day, and a full year is only reached when the same calendar day comes round again. Hours and minutes are counted from whole days (days × 24), because a birth time is not part of the input. Someone born on 29 February is counted as having their anniversary on 1 March in non-leap years. Zodiac signs use the common fixed boundary dates; a few sources shift a cusp by one day.
How the Age Is Calculated
An age is not a division. This calculator compares the date of birth with the calculation date on the calendar: it takes whole years first, then whole months, then the remaining days, borrowing from the previous month when the day number is smaller. That is why the result matches what people actually say - from 29 February to 1 March is one day, and a full year is only reached when the same calendar day comes round again. Leap years are handled exactly, including the century rule that makes 1900 a common year and 2000 a leap year. Next to the age you get the absolute number of days, the equivalent in weeks and days, the hours counted from whole days, the weekday you were born on, the date and day count of your next birthday, and the western zodiac sign for the date. The calculation date defaults to today and can be set to any other date. Nothing is sent to a server.
So wird das Alter berechnet
What is Age Calculator?
Age Calculator is a free online business tool built for freelancers, small teams and operations staff. Exact age in years, months, days and hours from any birth date, plus a countdown to the next birthday In practice you enter your date of birth, run the calculation, and then read your exact age and the countdown to your next birthday.
Your figures stay in the tab — no account, no upload and no analytics on what you typed.
How to use Age Calculator
- Enter your date of birth.
- Run the calculation.
- Read your exact age and the countdown to your next birthday.
Age Calculator FAQ
Is Age Calculator free to use?
Yes. Age Calculator is completely free and needs no account, no trial and no payment details. Every feature on the page is available without limits.
Is my data uploaded anywhere?
No. Age Calculator runs entirely in your browser, so the text, file or number you enter never leaves your device.
Does Age Calculator work on a phone or tablet?
Yes. It works in any modern browser on desktop, tablet and phone. There is no app to install and no account to create.
How do I use Age Calculator?
Enter your date of birth. Run the calculation. Read your exact age and the countdown to your next birthday.