Age Formula in Excel

Introduction to Age Calculation in Excel

Calculating age in Excel can be a straightforward task, but it requires a bit of understanding of how dates work in Excel. Excel stores dates as serial numbers, with January 1, 1900, being the first serial number. This makes it easy to perform arithmetic operations on dates. In this article, we will explore the different ways to calculate age in Excel, including using formulas and functions.

Using the DATEDIF Function

The DATEDIF function is a hidden function in Excel that can be used to calculate the difference between two dates in years, months, and days. The syntax for the DATEDIF function is:

DATEDIF(start_date, end_date, unit)

Where start_date is the birth date, end_date is the current date, and unit is the unit of time, which can be “Y” for years, “M” for months, or “D” for days.

Using the TODAY Function

The TODAY function returns the current date. We can use this function in conjunction with the birth date to calculate the age. For example:

=TODAY()-A1

Where A1 is the cell containing the birth date. This formula will give us the number of days between the birth date and the current date.

Calculating Age in Years, Months, and Days

To calculate the age in years, months, and days, we can use the following formula:

=INT((TODAY()-A1)/365.25)

This formula will give us the number of years between the birth date and the current date. To calculate the number of months, we can use the following formula:

=INT((TODAY()-A1)/30.44)

And to calculate the number of days, we can use the following formula:

=TODAY()-A1

We can also use these formulas to create a table that displays the age in years, months, and days.

Birth Date	Age in Years	Age in Months	Age in Days
1990-01-01	=INT((TODAY()-A2)/365.25)	=INT((TODAY()-A2)/30.44)	=TODAY()-A2

Using VBA to Calculate Age

We can also use VBA to calculate the age in Excel. The following code will calculate the age in years, months, and days:

Sub CalculateAge()

Dim birthDate As Date

Dim currentDate As Date

Dim ageInYears As Integer

Dim ageInMonths As Integer

Dim ageInDays As Integer

birthDate = Range(“A1”).Value

currentDate = Date

ageInYears = Int((currentDate - birthDate) / 365.25)

ageInMonths = Int((currentDate - birthDate) / 30.44)

ageInDays = currentDate - birthDate

Range(“B1”).Value = ageInYears

Range(“C1”).Value = ageInMonths

Range(“D1”).Value = ageInDays

End Sub

💡 Note: This code will calculate the age in years, months, and days and display it in cells B1, C1, and D1 respectively.

Conclusion and Final Thoughts

Calculating age in Excel can be done using various methods, including using formulas and functions, or using VBA. The method we choose will depend on our specific needs and the level of complexity we are comfortable with. By following the examples and code provided in this article, we should be able to calculate age in Excel with ease.