Age Calculator
Enter your date of birth to instantly discover your precise age in years, months, and days. See how many total days you have lived, what day of the week you were born, and how long until your next birthday.
- Exact age in years, months, and days
- Total days, weeks, and hours lived
- Next birthday countdown
- Day of the week you were born
Calculate Your Age
How to Use the Age Calculator
Enter your date of birth, then click “Calculate Age.” The calculator defaults to today, but you can optionally enter a specific “as of” date to calculate your age at any point in time — past or future.
About This Calculator
Our age calculator accounts for leap years and varying month lengths to give you a precise result. It also tells you what day of the week you were born on and counts down to your next birthday. All calculations happen in your browser — completely private and free.
Related Calculators
Explore more date calculation tools
Date Difference Calculator →
Calculate the exact difference between any two dates.
Days Between Dates →
Count the exact number of days between two dates.
Age Calculator →
Find your exact age in years, months, and days.
Days Until Date →
Count down the days until a specific future date.
Business Days Calculator →
Calculate working days excluding weekends.
Add/Subtract Days →
Add or subtract days from any date.
Week Calculator →
Find week number, quarter, and day of year.
Frequently Asked Questions
Common questions about calculating age
The calculator counts complete years, then remaining complete months, and finally remaining days from your birth date to today (or the specified date). It properly handles months with different lengths and leap years.
Yes! Use the optional “Calculate age as of” field to enter any date. This is useful for finding your age on a past event date or a future milestone.
The countdown calculates the exact number of days from today (or your selected date) to your next birthday anniversary. It correctly handles leap year birthdays (February 29).
No. All calculations happen entirely in your browser. Your birth date is never sent to any server, stored in any database, or tracked in any way. Your privacy is fully protected.