Age Calculation Methods Explained: From Birthdays to Age Milestones

Calculating age can be a challenging task. Have you ever thought about the many ways that individuals decide their ages? It's not as simple as it may appear because there are many techniques and mistakes do happen occasionally. In this essay, we'll delve into the intriguing realm of calculating age, from the long-standing practise of recording birthdays to the import of achieving significant ages.

Using Excel to Determine Your Age


In most cases, starting with an empty Excel file is the initial step. To launch Excel, either click the "Microsoft Office" button and select "Microsoft Excel" from the drop-down menu or use the dedicated Excel icon. You may either double-click on the Excel file you wish to open, or you can select a different Excel file from the drop-down menu.

Adapt the date format

The dates that work best for your calculations can be added next. Entering the current date as the end date and a prior date as the start date will get results that include the current day. The standard format for a date is DD:MM: YYYY. Enter the person's birthday in the first box using the format, and then add the current date to the second cell in the same row to get their age. You can include as many years of birth as you need in your analysis.

Put in the equation for the month or the year

You may find out how old you are in years and months once you put in certain dates. Excel allows you to calculate the time gap between two dates by subtracting them and then dividing the result by either one month or 365 days. The following equation determines a person's age: '=INT ((B2-A2)/365)' This formula may be used to determine the month: equation= B2-INT ((B2-A2)/30.4) The most up-to-date date can be found in both formulas at B2, whereas the original date can be found at A2. A2 and B2 can be replaced with a range of dates if you need to do computations for more than one birthday.

Determine the Age

Once Excel processes the formula you input, it will normally display the calculated result. If you enter this formula into cell C2 without making any mistakes, you will get the age you requested in either years or months. These figures often occur without any explicit units. If you do the math and come up with the number 20, for instance, you can figure out if the individual is 20 years old or 20 months old, depending on the exact method you employed. Follow these instructions for each person whose age you want to determine.

Excel's built-in age calculation functions

Here are various methods for determining a person's chronological age:

Using DATEIF operation to determine Age


Excel's DATEDIF function finds the difference between two dates and displays it. When performing a condition check, the DATEDIF clause is typically used. For instance, the DATEDIF formula may be used to calculate the age of a given date in Excel. C2 may be calculated using the formula = DATEDIF (A2, B2, "Y") if cells A2 and B2 contain the dates December 1, 2000 and December 1, 2020, respectively. When you press the 'Enter' key on your keyboard, the years separate the two numbers. To ensure correct operation, the DATEDIF function typically requires a beginning and ending date. The function may also include a unit. The parameter stands in for the desired visual representation of the output. A common convention is to use the letter 'Y' for years and the letter 'M' for months. Typically, the completion date follows the beginning date. The function often returns the '#NUM' error if the termination date is not valid.

Use of the YEARFRAC to determine Age


Like DATEDIF, YEARFRAC only returns a portion of a year. You may get a fractional measurement of the time period by using the YEARFRAC function. The YEARFRAC argument is one of three. The beginning date is the first argument, the ending date is the second, and the foundation is the third. When a function is used to determine a year's worth of fractions, the "basis" is the number of days used in the calculation. It is common practise for the YEARFRAC function to employ a fraction including its first two inputs in its computations. The first argument would be January 1st, and the last argument would be December 31st, if you wanted to show your age as a fraction. For example, "= YEARFRAC (B2, A2, 1)" would do the trick. Sometimes it's easier to work with a numerical formula.

Use of The INT and YEARFRAC routines


Excel's YEARFRAC function may also be used in conjunction with INT (an integer) to determine a person's age. You may use the formula =INT (YEARFRAC (cell, TODAY ())). This method calculates a difference in years and returns it. Inserting the formula =INT (YEARFRAC (B1, TODAY ())) into cell C1 normally provides the difference in years between the two dates as an integer. This is the case if cell A1 has the date "12/01/2009" and cell B1 contains the current date. Perform a ROUNDDOWN to determine Age If you have a value that is not an integer and would want it to be converted into an integer, you can use the ROUNDDOWN function. In contrast to the round-up function (ROUNDUP), this one rounds down. It is common practise to drop the digits following the decimal point when rounding down to a smaller value. If the age you calculated ends in a decimal, you may round it down using the ROUNDDOWN function. For instance, "=ROUNDDOWN ((B1-A1)/362.25,0)" would be the function to use if cells "A1" and "B1" contained the respective start and end dates, respectively. This function may be used to round down an individual's age from 15.32 years to 15.

Cases where knowing your age is useful

Some situations in which knowing how to determine someone's age may be useful are preparation of Birthdays. On a loved one's or friend's special day, you might wish to find out how old they are. Instead of manually figuring out the person's age, you can just plug in the relevant dates into Excel and get an instant result. If a person's birthday is coming up and they were born on January 1, 2000, you may use the following formulae to simply find out how old they are in days, months, and years.