Age Calculator Online
Calculate exact age in years, months, and days from a date of birth.
Age breakdown
30 years, 0 months, 0 days
Age
30yrs
All calculations happen in your browser. No data stored.
What Is an Age Calculator?
Age Calculator is a free online tool that calculate exact age in years, months, and days from a date of birth. No files are uploaded — everything is processed locally on your device.
An age calculator computes the exact age in years, months, and days between two dates — typically from a date of birth to today or to any other date you specify. It is useful for determining precise age for legal documents, understanding the exact difference between two events, or simply satisfying curiosity. Our calculator also shows the total age in months, weeks, days, and hours. All processing happens instantly in your browser.
Privacy guarantee: Age Calculator processes all files directly in your browser using WebAssembly. No data is uploaded to any server, no information is collected, and the tool works offline after loading. Unlimited usage with no signup, no watermarks, and no file size limits.
How to Use Age Calculator
Enter the birth date
Select or type your date of birth (or any starting date).
Set the end date
Choose today or enter a custom end date for the calculation.
Check your exact age
See your age broken down into years, months, days, and other units.
Why Use Our Age Calculator?
Frequently Asked Questions
Does the calculator handle leap years correctly?
Yes. The calculator accounts for leap years, including the special rules for century years. February 29 birthdays are handled accurately.
Can I calculate the difference between two arbitrary dates?
Yes. You can enter any two dates to find the exact difference between them in years, months, days, and other time units.
How is the age in months calculated when months have different lengths?
The calculator uses calendar months. If the current day of the month is before the birth day, it borrows from the previous month and accounts for that month's actual length.
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