Age Calculator
Enter your date of birth to see your exact age. Everything updates live and stays on your device.
Pick your date of birth to calculate your age.
Free online age calculator
This age calculator tells you exactly how old you are in years, months and days, based on your date of birth. It uses proper calendar math — borrowing days from the previous month and months from the year — so the result matches how we naturally count age, not just a rough division of days. Change the "age at date" field to work out how old you were (or will be) on any specific day, which is handy for birthdays, anniversaries, milestones and paperwork.
Your dates stay private
Unlike many online calculators, this tool does all the maths directly in your browser. The dates you enter are never sent to a server or stored anywhere — close the tab and everything is gone. It also shows the total number of days you have lived, a fun figure for celebrating round-number "day birthdays".
Frequently asked questions
How is my exact age calculated?
We count the full years between your date of birth and the chosen date, then the leftover full months, then the remaining days. When a month or day comes up short we borrow from the larger unit, using the actual number of days in each calendar month.
What does "total days" mean?
It is the raw number of calendar days between your date of birth and the age-at date, including leap days. Unlike years and months, it does not round — it simply counts every day that has passed.