FREE ONLINE AGE TOOL
Age Calculator
Calculate your exact age in years, months and days, along with total months, weeks, days and your next birthday countdown.
How to Use the Age Calculator
- Enter your date of birth in the Date of Birth field.
- Keep today’s date selected in Calculate Age On, or choose another date to find your age on that specific day.
- Click the Calculate Age button.
- Review your exact age in years, months and days.
- You can also see your total months, weeks, days and the number of days remaining until your next birthday.
How Is Your Age Calculated?
The calculator compares your date of birth with the selected calculation date. It first counts the number of complete years, then the remaining complete months, and finally the remaining calendar days.
For example, an age result of 25 years, 3 months and 12 days means that 25 complete years and 3 complete months have passed since the date of birth, followed by an additional 12 days.
The Total Days result shows the complete number of calendar days between the two selected dates. Total Weeks are calculated from the number of completed seven-day periods.
The calculator automatically adjusts for different month lengths and leap years, including dates in February.
Frequently Asked Questions
How accurate is this Age Calculator?
The calculator uses calendar dates to calculate completed years, months and days. It also accounts for different month lengths and leap years.
Can I calculate my age on a past or future date?
Yes. Change the Calculate Age On field to any valid date that is not earlier than your date of birth.
Why is total weeks shown as a whole number?
Total Weeks represents the number of complete seven-day periods between your date of birth and the selected calculation date.
How are leap-year birthdays handled?
The calculator automatically accounts for leap years. When a selected year does not contain February 29, it uses the nearest valid date for that month.
Does this website save my date of birth?
No. The calculation takes place inside your browser, and the entered dates are not submitted or stored by this calculator.
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