Age Calculator
Find your exact age in years, months, days, weeks and hours — plus your next birthday countdown and the day you were born.
Select your date of birth to see your age
How it works
Enter your birthday
Pick your date of birth from the date picker.
Choose a target date
Defaults to today — change it to any date you like.
See your results
Instant breakdown: years, months, days, weeks, hours and more.
When people use it
Filling official forms
A lot of forms — passport applications, school enrollment, insurance documents — ask for age in years and months, not just years. Getting it exactly right saves the back-and-forth of submitting an incorrect figure and waiting for a correction.
Measuring a past duration
It also works well for looking up how long ago something happened. A project launch, a relationship anniversary, the day a business was founded — the calculator turns any start date into a precise duration rather than a rough "about five years ago."
Planning birthday celebrations
The birthday countdown is genuinely useful for planning. Parents organizing a surprise, a group of friends coordinating a celebration, or anyone who just wants to know exactly how many days are left rather than counting on a calendar.
Frequently asked questions
How is my exact age calculated?
Your age is calculated by subtracting your date of birth from today's date (or any target date you choose), giving you the exact number of years, months, and days.
Can I calculate my age on a specific past or future date?
Yes. Change the "Age At Date" field to any date and the calculator will show your exact age on that day.
How many days until my next birthday?
The calculator automatically shows the number of days remaining until your next birthday and the exact date it falls on.
Is my date of birth stored anywhere?
No. All calculations happen entirely in your browser. Your date of birth is never sent to any server.
Does the calculator handle leap years correctly?
Yes. Leap years are accounted for in every calculation. If your birthday is February 29, the calculator shows February 28 as your birthday in non-leap years and counts the days accordingly.
Can I calculate the age of something other than a person?
Yes — the calculator works for any start date. You can find the age of a business, a website, a pet, a friendship, or any past event. Just enter the founding or start date as the date of birth.
What is my age in hours or weeks?
The calculator shows a breakdown that includes your age in weeks and hours, not just years. These numbers update in real time based on the current time of day.