Find out your precise age and see your next birthday: years, months, and days, plus totals in weeks and days.
Result
Years
—
Months
—
Days
—
Total in months—
Total in weeks—
Total in days—
Total in minutes—
Next Birthday
Date—
Day of the week—
Remaining days—
The age calculator shows your exact age in years, months, and days, as well as totals in months, weeks, days, and minutes. The panel also displays your next birthday (date, day of the week, and how many days are left). Everything is processed locally in your browser—fast, private, and with no registration required.
You can calculate your age for "today" or choose a reference date (past or future) to find out your exact age on a specific day. The algorithm considers months with different durations and leap years, delivering consistent results.
How to Use (Step-by-Step)
Enter the date of birth: select the correct day, month, and year. Use "Today" to fill it in quickly if needed.
(Optional) Reference date: under "Calculate age on," choose the date for which you want to get the exact age. If left blank, the reference is today.
Calculate: click Calculate to see the detailed age and the totals (months, weeks, days, and minutes).
Next birthday: check the date, day of the week, and remaining days until your next celebration.
Clear: use Clear to reset the fields and perform a new calculation.
Application Features (Highlights)
Exact age: years, months, and days, with totals in months, weeks, days, and minutes.
Reference date: calculate age on any past/future date.
Next birthday: shows the date, day of the week, and a countdown of remaining days.
"Today" button: a shortcut to quickly fill in dates.
Responsive and accessible: good readability on desktop and mobile; messages with aria-live for screen readers.
Privacy by default: everything is local, with no data sent to servers.
Understanding the Results and Totals
Years / months / days: breaks down the interval from birth to the reference date.
Total in months: useful for milestones (e.g., "18 months old").
Total in weeks and days: a practical reference for medium-term periods.
Total in days: the gross count of days in the interval.
Total in minutes: a useful approximation for curiosity and reports.
Next birthday: considers the current calendar and leap years.
Special Cases and Customization
Born on February 29: in non-leap years, the birthday is adjusted (by default, to Feb 28) to maintain consistency.
Invalid dates: birth after the reference date is not allowed; please review the fields.
Region and format: the date picker respects the language/region settings of your browser and system.
Accessibility and Compatibility
Screen readers: results are in regions with aria-live for immediate feedback.
Keyboard: tabbing navigation is preserved with visible focus.
Offline: after loading, it works even without an internet connection (local resources).
Best Practices
Review the dates: one incorrect digit changes the result.
Check for leap years: years with Feb 29 affect the count; use the date picker to avoid errors.
Document the criteria: when sharing results, state the reference date used.
Common Errors to Avoid
Birth after reference date: generates a negative/invalid age.
Swapped dates: confusing the birth and reference date fields.
Regional format: do not force manual formatting; use the date picker.
Frequently Asked Questions (FAQ)
Can I calculate age on any date? Yes. Use "Calculate age on" for future or past dates.
Does it consider leap years? Yes. The algorithm automatically handles variable months and Feb 29.
What about people born on February 29? In non-leap years, the birthday is adjusted (default: Feb 28).
Is data sent to servers? No. The calculation happens in your browser.
Does it work on mobile? Yes. The interface is responsive and lightweight.
Summary
The age calculator offers a precise and complete view: exact age, totals in different units, and next birthday information. Simple, fast, and private—ideal for personal, educational, and professional use.
Note: educational content; does not replace medical, legal, or professional advice. Adapt practices to your context and needs.