Date Tools
Age Calculator
Enter your date of birth to find your exact age in years, months, and days. See what day you were born, when your next birthday is, and how old you will be on any future date.
How it works
The calculator counts full years from your birthday, then full months from the most recent anniversary, then remaining days. It also shows your age expressed as total months, weeks, days, and hours since birth.
Frequently asked questions
How is the exact age calculated?
Age is calculated by counting full years, then remaining full months, then remaining days from the most recent birthday.
What does 'age on a future date' do?
It shows how old you will be on that future date, useful for planning milestones like retirement age or a future birthday.
Is data sent to a server?
No. All calculations happen in your browser. Nothing is stored or transmitted.
What is the 'Next birthday' countdown?
It shows the number of days until your next birthday, including the date it falls on this or next year.