How to Calculate Age in Excel from a Specific Date: A Step-by-Step Guide

Calculating age in Excel from a specific date is a straightforward task that can be accomplished using a few built-in functions. By following these simple steps, you’ll be able to determine someone’s age accurately. This article will walk you through the process in a step-by-step manner and offer tips and answers to frequently asked questions.

How to Calculate Age in Excel from a Specific Date

This guide will show you how to use Excel to calculate age based on a specific date. By the end of these steps, you’ll have a cell in your spreadsheet that automatically calculates the age from a given date.

Step 1: Open Excel and Prepare Your Data

First, open Excel and enter your data. In column A, list the dates of birth. In column B, you’ll calculate the ages.

In this step, ensure your dates of birth are formatted correctly. Excel recognizes dates in formats like MM/DD/YYYY or DD/MM/YYYY, depending on your regional settings.

Step 2: Select the Cell for the Age Calculation

Next, click on the cell where you want the age to appear. This should be in column B, next to the first date of birth.

Placing the age calculation in the adjacent cell helps keep your data organized and easy to read.

Step 3: Use the DATEDIF Function

Enter the DATEDIF function in the selected cell to calculate the age. The formula is =DATEDIF(start_date, end_date, "Y").

The DATEDIF function calculates the difference between two dates. In this case, "start_date" is the date of birth, and "end_date" is the date you want to calculate the age from. The "Y" parameter tells Excel to return the result in years.

Step 4: Reference the Date of Birth and Today’s Date

In the formula, replace "start_date" with the cell reference for the date of birth (e.g., A2). For "end_date," use the TODAY() function to use the current date.

By using the TODAY() function, Excel automatically updates the age calculation each day, ensuring it’s always accurate.

Step 5: Copy the Formula Down the Column

Finally, copy the formula down column B to calculate the ages for all dates of birth listed in column A.

Dragging the fill handle (the small square at the cell’s bottom-right corner) down the column will copy the formula to adjacent cells, applying the age calculation to each date of birth.

After completing these steps, you will have a list of ages calculated from the specific dates in your spreadsheet.

Tips for Calculating Age in Excel from a Specific Date

  • Ensure all dates of birth are correctly formatted so Excel can recognize and process them accurately.
  • Use absolute references if you want a fixed end date instead of the current date.
  • Apply conditional formatting to highlight any ages that fall within certain ranges.
  • For more advanced calculations, combine DATEDIF with other functions like IF to handle different scenarios.
  • Double-check your formulas to ensure they are applied correctly, especially when working with large datasets.

Frequently Asked Questions

What does the DATEDIF function do?

The DATEDIF function calculates the difference between two dates and can return the result in years, months, or days.

Can I use a specific end date instead of TODAY()?

Yes, you can replace TODAY() with any date you want by using the date in quotes, like "12/31/2023".

What if my dates are in a different format?

Ensure that the cell format matches your date format. You can change the format by right-clicking the cell and selecting "Format Cells."

How do I fix errors in the DATEDIF function?

Check your date formats and make sure you’re using the correct cell references. Errors often occur due to incorrect syntax or invalid dates.

Can I calculate age in months or days?

Yes, by changing the "Y" parameter in the DATEDIF function to "M" for months or "D" for days.


  1. Open Excel and prepare your data.
  2. Select the cell for the age calculation.
  3. Use the DATEDIF function.
  4. Reference the date of birth and today’s date.
  5. Copy the formula down the column.


Calculating age in Excel from a specific date is a useful skill that can save you time and ensure accuracy in various tasks. Whether you’re managing a database, tracking employee information, or simply curious about someone’s age, Excel provides the tools to do it effortlessly. By following the steps outlined in this guide, you can master this function and impress others with your newfound Excel prowess.

Don’t stop here; Excel has a plethora of functions that can make your life easier. Continue exploring and experimenting with different formulas and features. Your data management skills will improve, and so will your efficiency.

Happy calculating!

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