Excel Tutorial: How To Convert Birthdate To Age In Excel


Many Excel users find it challenging to calculate age from birthdate in Excel, but it is a vital skill for data analysis and reporting. In this tutorial, we will walk you through the process of converting birthdates to ages in Excel, making it a simple and straightforward task.

Explanation of the problem

Converting birthdates to ages in Excel can be confusing for many users, especially those who are new to the software. The lack of a built-in function for this task often leads to frustration and unnecessary time spent on finding a solution.

Importance of this skill

Being able to accurately calculate age from birthdate is crucial for various purposes, such as demographic analysis, financial reporting, and database management. Mastering this skill will significantly improve your efficiency and accuracy in Excel.

Overview of the tutorial

In this blog post, we will provide a step-by-step guide on how to easily convert birthdates to ages in Excel. By the end of this tutorial, you will have a clear understanding of the process and be able to apply it to your own data analysis tasks.

Key Takeaways

  • Converting birthdates to ages in Excel is a crucial skill for data analysis and reporting.
  • Understanding the DATE and TODAY functions is essential for calculating age from birthdate.
  • Formatting the result as an age and handling different date formats are important aspects of this task.
  • Being able to apply the formula to real-world scenarios will enhance data analysis and reporting.
  • Practicing the tutorial steps will improve efficiency and accuracy in Excel.

Understanding DATE and TODAY functions

When working with dates in Excel, it's important to understand the DATE and TODAY functions, which can be extremely useful in various calculations and data analysis. In this tutorial, we'll explore how to use these functions to convert a birthdate to age in Excel.

A. Explanation of the DATE function

The DATE function in Excel allows you to create a date from specific year, month, and day values. The syntax for the DATE function is =DATE(year,month,day). Here's how to use the DATE function to create a date:

  • Year: The year argument is a four-digit number representing the year.
  • Month: The month argument is a number representing the month (1 for January, 2 for February, and so on).
  • Day: The day argument is a number representing the day of the month.

B. Explanation of the TODAY function

The TODAY function in Excel returns the current date. This function is useful when you need to perform calculations based on the current date. The syntax for the TODAY function is simply =TODAY(). Here's how to use the TODAY function to get the current date:

  • Usage: Simply enter =TODAY() into a cell, and it will display the current date.
  • Dynamic: The TODAY function is dynamic, meaning it updates automatically whenever the workbook is recalculated or when the worksheet is reopened.

Calculating the difference between birthdate and today

When working with birthdates in Excel, it's often necessary to convert the birthdate into an age. There are a few different methods for achieving this, and we'll cover a couple of the most commonly used ones.

A. Using the DATEDIF function

The DATEDIF function is a handy tool for calculating the difference in days, months, or years between two dates. To use this function to convert a birthdate to an age, you would enter the following formula into a cell:

=DATEDIF(birthdate, TODAY(), "Y")

Where "birthdate" is the reference to the cell containing the birthdate. This formula will return the age in years.

  • 1. Replace "Y" with "M" to get the age in months, or "D" to get the age in days.
  • 2. Keep in mind that the DATEDIF function is not documented in Excel's help files, but it is still available for use.

B. Using mathematical operations

Another way to convert a birthdate to an age in Excel is by using simple mathematical operations. You can achieve this by subtracting the birthdate from the current date to get the difference, like so:

=YEAR(TODAY())-YEAR(birthdate) - IF(MONTH(TODAY())

  • 1. This formula calculates the age in years, taking into account the birth month and day.
  • 2. You can modify it accordingly to get the age in months or days.

Formatting the result as an age

After calculating the age from the birthdate using Excel, it is essential to format the result as an age for better presentation.

A. Using the YEAR function

How to extract the year from the calculated age difference

  • Once the age is calculated using the DATEDIF or other methods, the next step is to use the YEAR function to extract the year from the age.
  • To do this, simply use the formula =YEAR(TODAY()) - [cell containing the birthdate] to get the year from the age difference.

B. Formatting the result

How to combine the YEAR function with text to format the result as an age

  • To format the result as an age, combine the YEAR function with text by using the formula =YEAR(TODAY()) - [cell containing the birthdate] & " years" to add the text "years" to the calculated age.
  • This will display the age in a more reader-friendly format, making it easier to understand at a glance.
  • Remember to adjust the cell formatting to ensure the result appears as a number rather than a date.

Handling different date formats

When working with birthdate data in Excel, it's important to ensure that the date format is consistent and accurately recognized by the program. Here are some ways to handle different date formats:

A. Converting text to date

Many times, birthdate data is stored as text in Excel, which can create issues when trying to perform calculations based on age. To convert text to date, follow these steps:

  • Highlight the range of cells containing the birthdate data.
  • Go to the "Data" tab and select "Text to Columns."
  • Choose "Delimited" and click "Next."
  • Check the box for "Space" as the delimiter and click "Finish."
  • Excel will convert the text to date format that is recognizable by the program.

B. Dealing with regional date settings

Excel's formulas for calculating age are based on the date settings of the user's computer. This can create issues when sharing files with users from different regions. To adjust formulas for different regional date settings, use the following techniques:

  • Use the DATE function to specify the year, month, and day in a formula, ensuring that the order of the arguments matches the regional date settings.
  • For example, instead of using the formula =YEAR(TODAY())-YEAR(A2), use =YEAR(TODAY())-YEAR(A2) to account for different date formats.
  • Alternatively, use the YEARFRAC function to calculate the difference in years between two dates, which is not affected by regional date settings.

Using the formula in a real-world scenario

When working with datasets in Excel, it is often necessary to convert birthdates to ages for various reporting and analysis purposes. This can be easily achieved using a simple formula in Excel, allowing for efficient and accurate calculations.

Applying the formula to a dataset

Let’s consider a dataset containing a list of individuals’ birthdates. To calculate their ages, we can apply the following formula:

  • Step 1: Create a new column for “Age” next to the column containing birthdates.
  • Step 2: In the first cell of the “Age” column, enter the formula =YEAR(TODAY())-YEAR([cell containing birthdate]).
  • Step 3: Drag the fill handle of the first cell down to apply the formula to all the rows in the dataset.
  • Step 4: The “Age” column will now display the calculated ages based on the birthdates.

Using the formula in reports and analysis

The ability to convert birthdates to ages in Excel can enhance data analysis and reporting in various ways. For example:

  • It allows for better segmentation and analysis of age groups within a dataset.
  • It enables the creation of age-based graphs and charts for visual analysis.
  • It facilitates the calculation of average ages and age-related statistics for reporting purposes.


A. In this tutorial, we covered the steps to convert a birthdate to age in Excel using the DATEDIF and TODAY functions, as well as simple subtraction.

B. Mastering this skill is essential for anyone working with data in Excel, as it allows for efficient calculation and analysis of age-related information without the need for manual calculations.

C. I encourage all readers to practice the tutorial steps and incorporate this useful skill into their Excel repertoire. With a bit of practice, you'll be able to quickly and accurately calculate ages from birthdates in no time!

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