Age Calculator by Date of Birth
Use this age calculator by date of birth to find your exact age in years, months, and days. First, enter your DOB. Then, this free age calculator online will also show your total months, weeks, days, and hours, as well as the days left until your next birthday. In addition, it works as an age calculator by date, so you can check your age on today’s date or on any other date.
How to Use the Age Calculator by Date of Birth
- First, select your date of birth in the first box.
- Next, keep the second box as today's date, or choose another date to check your age on that day.
- Then press Calculate Age to see your result.
- Finally, press Reset if you want to try a different date.
What Does This Age Calculator Show?
Besides your basic age, the results box also shows these details:
- Your age in years, months, and days
- Your age in total months, weeks, days and hours
- The day of the week you were born
- Your next birthday and how many days are left
Age Calculator by Date (Check Age on Any Date)
Many forms, exams, and job applications ask for your age on a fixed cut-off date instead of today's date. Because of this, you need to check your age on that exact day. With this age calculator for DOB, simply type the cut-off date in the "Age as on" box. As a result, you will see your exact age on that day.
For example, if your date of birth is 10 August 2001 and the cut-off date is 1 August 2026, your age is 24 years, 11 months and 22 days. In other words, you are still 24 on that date, because your 25th birthday comes nine days later.
Age Calculator Year in Month
If you need your age as a year-and-month result, this calculator gives it in two ways. First, the main result shows years and months together, for example, 25 years and 9 months. Second, the results box shows your total months, so you can see how many months old you are in a single number.
How Is Age Calculated from Date of Birth?
An age calculator by date of birth works out the time between your birth date and the date you want to check. First, it counts the complete years. Then it counts the remaining complete months, and finally it counts the leftover days. However, if the day of the month is smaller than your birth day, one month is borrowed and the days of the previous month are added.
For example, if your date of birth is 15 March 2000, your age on 1 January 2026 is 25 years, 9 months and 17 days.
Age Calculator 2026: Age by Birth Year
Here is a quick age calculator 2026 table. It shows the age you turn in 2026 for each birth year. However, if your birthday has not come yet this year, your current age will be one year less.
| 1980 | 46 |
| 1985 | 41 |
| 1990 | 36 |
| 1995 | 31 |
| 2000 | 26 |
| 2005 | 21 |
| 2010 | 16 |
Therefore, for your exact age in years, months and days, use the calculator above.
Age Calculator in Excel
- You can also build an age calculator in Excel with the DATEDIF function. If your date of birth is in cell A2:
- Years: =DATEDIF(A2,TODAY(),"Y")
- Months after the last full year: =DATEDIF(A2,TODAY(),"YM")
- Days after the last full month: =DATEDIF(A2,TODAY(),"MD")
Why Use This Age Calculator Online?
- Free and instant: no sign-up is needed, and the result appears in one click.
- Age on any date: useful for exam forms, job applications, admissions, and eligibility checks.
- Works on mobile: the calculator fits any screen size.
- Handles leap years: months and leap-year birthdays are counted correctly.
