Age Calculator
Enter a date of birth to calculate exact age in years, months and days. You can also check age on a past or future date, see total days and weeks lived, and find the next birthday.
Calculate age from date of birth
Use today or choose any cutoff date.
For exam, job or school eligibility, enter the exact cutoff date from the official notification.
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How to use the Age Calculator
Enter your date of birth
Select the DOB exactly as it appears on the record you want to use.
Choose an “age as of” date
Use today, or enter a cutoff date for an exam, job, admission or other purpose.
View the age breakdown
See completed years, months and days plus birthday and elapsed-time details.
How age is calculated
The calculator compares your date of birth with the selected target date using calendar years, months and days. If the target day is earlier than the birth day, the calculation borrows days from the previous calendar month. If the resulting month difference is negative, it borrows one year.
This is more accurate than simply subtracting the birth year from the target year because exact age depends on whether the birthday has already occurred.
| Date of birth | Age as of | Exact age | Use case |
|---|---|---|---|
| 10 Mar 2000 | 6 Jul 2026 | 26 years, 3 months, 26 days | General age check |
| 15 Aug 2000 | 1 Jan 2026 | 25 years, 4 months, 17 days | Age on a past/future cutoff |
| 1 Jul 2008 | 1 Jul 2026 | 18 years, 0 months, 0 days | Completed-age cutoff |
Age calculator for exams, jobs and admissions
Many applications do not ask for your age “today”. They specify a cutoff date such as 1 January, 1 July or the last date of application. To check eligibility, enter the date of birth from your official record and use the exact cutoff date stated in the notification.
Age in years, months, days, weeks and total days
The main result shows completed calendar years, months and remaining days. The additional breakdown shows total elapsed days, completed weeks and completed calendar months. These figures answer slightly different questions, so they should not be mixed.
- Years, months and days: best for age statements and cutoff-date checks.
- Total days: the number of calendar days elapsed between the two dates.
- Total weeks: completed seven-day periods based on total days.
- Completed months: completed calendar months in the exact age result.
Which generation am I? Gen Z, Millennial, Gen X and more
Your birth year is often used to place you in a broad generational cohort. These labels are useful for general discussion, but they are not official age categories and the cutoff years can vary between researchers and publishers.
A commonly used research range for people born before the post-war baby boom.
The U.S. Census-linked baby-boom years are widely treated as a distinct cohort.
A commonly used range between the Baby Boomers and Millennials.
Pew Research Center uses 1981 through 1996 for the Millennial generation.
This calculator starts Gen Z at 1997. The 2012 endpoint is a practical convention; exact endpoints vary.
Used here as an informal label for the cohort after Gen Z; naming and boundaries are still less standardized.
Leap years and February 29 birthdays
The calculator uses actual calendar month lengths, so leap years are included in the date calculation. People born on February 29 should be especially careful when using the result for legal, exam or institutional eligibility because rules for the effective birthday in a non-leap year can vary.
For general date arithmetic, the calculator follows the calendar dates you enter. For an official age rule, follow the definition used by the relevant authority.
Common age-calculation mistakes
- Subtracting only the years: 2026 − 2000 is not always age 26; the 2026 birthday may not have happened yet.
- Using today instead of the cutoff date: applications often specify a separate “age as of” date.
- Ignoring month lengths: months have 28, 29, 30 or 31 days, so manual borrowing can cause errors.
- Treating an online result as an official ruling: eligibility may include special age-relaxation or date-counting rules.
Related calculators and guide
Frequently Asked Questions
How do I calculate my exact age from date of birth?
Enter your DOB and the date on which you want to know your age. The calculator returns completed years, completed months and remaining days.
Can I calculate my age on a future date?
Yes. Choose any target date after your date of birth to see how old you will be on that date.
Can I use this for exam or job age eligibility?
You can use it to calculate your calendar age on the stated cutoff date. Always check the official notification for age limits, relaxations and special rules.
Does the calculator handle leap years?
Yes. It uses real calendar month lengths. February 29 birthdays may have special official treatment in non-leap years, so verify the applicable rule when eligibility matters.
What is the difference between age and total days lived?
Age in years, months and days is a calendar breakdown. Total days is the elapsed number of calendar days between the two dates.
Which generation am I based on my birth year?
The calculator shows a common generation label using your birth year. The ranges are approximate, and different sources may use slightly different cutoff years.
Is my date of birth stored?
The age calculation on this page runs in your browser. The entered dates do not need to be sent to a server to produce the result.
Last updated: October 18, 2026. For official age eligibility, verify the governing notification or authority.