Age Calculator
Calculate exact age in years, months, days — plus total weeks, hours and minutes. Runs live in your browser.
What is the Age Calculator?
The Age Calculator computes the exact age between two dates — years, months and days, plus totals in days, weeks, hours and minutes, and a countdown to the next birthday. Leap years and varying month lengths are handled correctly.
Calendar age differs from simply dividing total days by 365 because months have different lengths and leap years add days. The calculator first counts complete years and months, then reports the remaining days using calendar boundaries.
Enter a birth date and optionally a target date, which defaults to today. Totals in smaller units are useful for elapsed-time context, while the year-month-day result matches common age reporting.
How to use the Age Calculator
- 1Enter the birth date.
- 2Optionally enter a target date — the default is today.
- 3Read the years/months/days breakdown, plus total days, hours and the next-birthday countdown.
When to use the Age Calculator
- Check age on a specific historical or future date for an application or event.
- Calculate the exact years, months and days for a birthday announcement.
- Compare two dates where leap years make rough day-based arithmetic unreliable.
- See the countdown to the next birthday while keeping the full elapsed-time totals.
Key features
- Precise year/month/day breakdown
- Totals in days, weeks, hours and minutes
- Next birthday countdown
- Correct leap-year handling
Important notes
- Dates are calculated locally and are not uploaded. Legal age cutoffs and leap-day rules can vary, so consult the governing policy for official decisions.
Frequently asked questions
How is age counted?
By full calendar years, then remaining months and days — the same convention official forms use.
Can I compare two people's ages?
Yes — enter the two birth dates to see the difference.
How are leap-day birthdays handled?
Calendar arithmetic includes leap years correctly. Legal treatment of a February 29 birthday in non-leap years can vary by jurisdiction.
Can I use the result as legal proof of age?
No. The arithmetic can assist with checking, but official eligibility decisions require accepted identity documents and the rules of the relevant organization.
All Utility
Tap any tool to jump straight in — no signup, works on mobile.