How to Age Calculate in Excel: A Step-by-Step Guide for Beginners

How to Calculate Age in Excel

Calculating age in Excel might sound like a daunting task, but it’s surprisingly straightforward. By using a couple of simple formulas, you can easily determine someone’s age from their birthdate. This article will guide you step-by-step through the process, ensuring that you get accurate results every time. Let’s dive in!

Step by Step Tutorial: How to Calculate Age in Excel

In this section, you’ll learn how to use Excel formulas to calculate the age of a person based on their birthdate. These steps will help you create a formula that automatically calculates the age, ensuring you never have to do it manually again.

Step 1: Open Excel and Enter Data

Open Excel and type the birthdate into a cell, for example, A1, and today’s date into another cell, for example, B1.

When you open Excel, you’ll see a grid of cells. Click on any cell to enter the birthdate. Make sure to use the correct date format (e.g., MM/DD/YYYY). In another cell, enter today’s date using the same format.

Step 2: Use the DATEDIF Function

In a new cell, type the formula =DATEDIF(A1, B1, "Y").

The DATEDIF function calculates the difference between two dates. Here, A1 is the birthdate, B1 is today’s date, and "Y" specifies that you want the result in years.

Step 3: Press Enter

Hit the Enter key to see the calculated age.

After pressing Enter, Excel will calculate and display the age based on the birthdate and today’s date. If the formula is correct, the result should be the number of full years.

Step 4: Format the Cells (Optional)

Format the cells if needed to ensure the dates are displayed correctly.

You can format the cells to make sure the dates and results are easy to read. Right-click on the cell, choose "Format Cells," and select the appropriate date format.

Step 5: Copy the Formula

Copy the formula to other cells if you need to calculate ages for multiple people.

Click on the cell with the formula, then drag the fill handle (a small square at the cell’s bottom-right corner) to copy the formula to adjacent cells.

After completing these steps, you should see the ages calculated automatically based on the birthdates and current date.

Tips for How to Calculate Age in Excel

  • Double-check dates: Ensure that the date format is consistent to avoid errors.
  • Use TODAY function: Replace the static today’s date with =TODAY() for dynamic calculations.
  • Include months and days: Add additional arguments in DATEDIF for months ("YM") and days ("MD").
  • Handle errors: Use IFERROR to manage any potential errors in your formulas.
  • Keep it simple: Start with basic formulas and add complexity as needed.

Frequently Asked Questions: How to Calculate Age in Excel

What if my dates are in different formats?

Ensure that all dates are in the same format by using the "Format Cells" option to standardize them.

How do I calculate age in months?

Use the DATEDIF function with the "YM" argument to get the difference in months.

Can I calculate age without the DATEDIF function?

Yes, you can use the YEARFRAC function or a combination of other date functions, but DATEDIF is the simplest.

What if the calculation returns an error?

Check your cell references and date formats. Errors usually occur due to incorrect input.

How do I update the age automatically?

Use the =TODAY() function in place of a static date to automatically update the age calculation every day.


  1. Step 1: Open Excel and Enter Data
  2. Step 2: Use the DATEDIF Function
  3. Step 3: Press Enter
  4. Step 4: Format the Cells (Optional)
  5. Step 5: Copy the Formula


Learning how to calculate age in Excel can save you a lot of time and effort, especially if you frequently need to perform this task. By following the steps outlined in this article, you can easily set up a reliable age calculation formula. Remember to double-check your dates and use dynamic functions like =TODAY() to keep your data current.

Once you’ve mastered the basics, you can explore more advanced functions and techniques to further enhance your Excel skills. Whether you’re managing data for work or personal projects, knowing how to calculate age in Excel is a valuable tool in your arsenal. Happy calculating!

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