This free age calculator instantly tells you exactly how old you are in years, months and days. Enter your date of birth to see your precise age, the total number of days you have lived, and how many days are left until your next birthday — no sign-up, right in your browser.
How to use the age calculator
- Enter your date of birth in the field above.
- Press the “Run” button or the Enter key.
- See your exact age in years, months and days, the number of days you have lived, and a countdown to your birthday.
How the calculator works out your age
First the calculator counts your full years — how many times your birthday has already occurred since you were born. If it has not happened yet this year, that year is not counted.
The remaining time is then broken down into months and days using the real length of each month and leap years, including February 29. That is why the age is exact, down to the day.
Everything is calculated for today's date in your device's local time — you do not need to enter the current date yourself.
What else the calculator shows
Beyond your age in years, months and days, you can see the total number of days you have lived, from your date of birth up to today.
Next to it is a countdown showing how many days are left until your next birthday. If your birthday is today, the calculator points it out.
When it comes in handy
To state your exact age on forms and documents, work out a child's age in months and days, measure time since any date, or simply out of curiosity — to find out exactly how many days you have already lived.
Age calculator FAQ
How do I calculate my age from my date of birth?
Enter your date of birth in the field above and press “Run”. The calculator shows your full age in years, months and days as of today.
How old am I exactly?
Your full years are the number of times your birthday has already occurred since you were born. The calculator checks whether it has happened yet this year, so the result is precise.
Does the calculator account for leap years?
Yes. It uses the real calendar, including February 29 and the different lengths of each month, so your age is exact to the day.
What if I was born on February 29?
The calculator handles this date correctly. In non-leap years your age is counted by the actual calendar, without errors.
How many days have I lived?
The calculator shows the total number of days you have lived, from your date of birth up to today.
How many days are left until my birthday?
A countdown below the result shows how many days remain until your next birthday.
Is the age calculator free?
Yes, it is completely free and works without any sign-up or limits.
Do you store my date of birth?
No. Every calculation runs directly in your browser on your device — your date of birth is never sent anywhere or saved.
Does the calculator work on mobile?
Yes, the page adapts to phones, tablets and computers and works the same on any screen.
Do I need an internet connection?
The page is lightweight and loads fast, and the calculation itself runs locally in your browser once the page has loaded.