Age Calculator
Calculate your exact age in years, months, days, hours, and minutes. Find out when your next birthday is and more fun facts.
Enter Dates
Born: Monday, January 15, 1990
You were born on a Monday
Your Age
36 years, 4 months, 13 days
More Details:
Next Birthday:
Friday, January 15, 2027
In 232 days • You'll turn 37
Fun Facts:
♑
Zodiac
Capricorn
🐉
Chinese Zodiac
Horse
Generation
Millennial
How Age is Calculated
Age is calculated by counting the number of complete years, months, and days between your birth date and the target date. A year is complete when the same month and day have passed. Months are counted similarly, with days making up the remainder.
Generation Chart
Gen Alpha
2013-present
Gen Z
1997-2012
Millennials
1981-1996
Gen X
1965-1980
Baby Boomers
1946-1964
Silent Gen
1928-1945
Age Calculator Guide
An age calculator finds the exact time between a birth date and a target date. It is useful for birthdays, school forms, legal age checks, insurance paperwork, medical records, eligibility dates, and personal milestones.
The result can look simple, but exact age is more than subtracting years. Months have different lengths, leap years exist, and a birthday has to pass before a full year is counted.
How to Use This Calculator
- Enter the birth date. Use the actual date of birth.
- Choose the target date. Use today's date for current age or another date for future/past age.
- Review years, months, and days. This is the most practical age format.
- Check total days or weeks. These are useful for milestones and date planning.
How Exact Age Is Calculated
Exact age is calculated by counting completed years first, then completed months, then remaining days. If the target day is earlier than the birth day in the month, the calculator borrows days from the previous month.
Exact Age
Where:
- Completed Years= Full birthdays passed by the target date
- Completed Months= Full months after the last birthday
- Remaining Days= Days left after completed years and months
Common Uses
- Checking age for school, sports, exams, or registrations.
- Calculating age on a future eligibility date.
- Finding days until the next birthday.
- Tracking baby age in months and days.
- Planning milestone birthdays and anniversaries.
Worked Examples
Current Age Example
Problem:
A person born on January 15, 1990 wants their age on May 20, 2026.
Solution Steps:
- 1Count full years from January 15, 1990 to January 15, 2026: 36 years
- 2Count full months from January 15 to May 15: 4 months
- 3Count remaining days from May 15 to May 20: 5 days
Result:
The exact age is 36 years, 4 months, and 5 days.
Age Before Birthday
Problem:
A person born on September 10, 2000 checks age on August 1, 2026.
Solution Steps:
- 1The 2026 birthday has not happened yet.
- 2Completed years are 25, not 26.
- 3Then count months and days after the 25th birthday.
Result:
The calculator avoids overcounting by waiting until the birthday has passed.
Tips & Best Practices
- ✓Use the official date format from the document you are completing.
- ✓For legal or medical forms, verify whether the rule uses birthday, calendar year, or exact date.
- ✓For babies, track months and days rather than rounding to years.
- ✓Use the target date feature for eligibility and milestone planning.
Frequently Asked Questions
Sources & References
- USA.gov - Vital Records (2026)
- CDC - Developmental Milestones (2026)
Last updated: 2026-05-20
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Editorial Note
MyCalcBuddy Editorial Team
This page is maintained as an educational calculator reference.
Formula Source: Standard Mathematical References
by Various