How To Calculate Age In Excel – Simple Formula Guide

In this process, we will guide you through the steps to calculate age using Excel.

This involves entering a specific formula into the desired cell, allowing the automatic calculation of age based on the provided data.

There are a few ways to calculate someone’s age in Excel, depending on how accurate you want the result to be. Here are the most common methods, explained simply:

1. Using YEARFRAC and INT (more accurate)
If you want an accurate age calculation that accounts for leap years and partial years, this is a great option.

Formula:
=INT(YEARFRAC(date_of_birth, TODAY()))

• Replace date_of_birth with the cell containing the person’s birthdate.

• TODAY() gets the current date automatically.

• YEARFRAC calculates the total number of years (including decimals) between two dates.

• INT removes the decimal part to give the full number of years.

2. Using YEAR and TODAY (quick and simple)
This method is easier but may be off by a year if the birthday hasn’t occurred yet this year.

Formula:
=YEAR(TODAY()) - YEAR(date_of_birth)

• It just subtracts the birth year from the current year.

• It doesn’t account for whether the birthday has already passed, so it’s not always precise.

3. Using DATEDIF (less common but accurate)
Another accurate way is with the DATEDIF function, which isn’t listed in Excel’s suggestions but works reliably.

Formula:
=DATEDIF(date_of_birth, TODAY(), "y")

• This calculates the number of full years between the birthdate and today.

• It’s accurate and simple once you know the formula.

Step-by-Step Guide: How To Calculate Age In Excel

Step 1

Select the cell where you want the age to be displayed.

Step 2

Click on that cell and enter the following formula: =TRUNC(YEARFRAC(<start_date>, TODAY(), 1)). Refer to the video for a detailed walkthrough.

Step 3

Once done, press "Enter." This will automatically calculate and display the ages in the selected cell.

Pro-tips for calculating age in MS Excel

• Use the DATEDIF function with =DATEDIF(A1, TODAY(), Y) to calculate age in years accurately.

• Combine YEARFRAC with INT for precise age calculations, especially when considering leap years.

• Ensure the date of birth format is correct (MM/DD/YYYY or DD/MM/YYYY) to avoid calculation errors.

Common mistakes and how to avoid them while calculating age in MS Excel

• Using an incorrect date format may result in errors always format date cells as Date before performing calculations.

• Forgetting to update the reference date can cause incorrect results use TODAY() to keep the age calculation dynamic.

• Relying only on subtraction (e.g., =YEAR(TODAY())-YEAR(A1)) may lead to inaccurate results use DATEDIF for precision.

Common FAQs for calculating age in MS Excel

1. What is the easiest formula to calculate age in MS Excel?
   The simplest formula is =DATEDIF(A1, TODAY(), Y), where A1 contains the date of birth.

2. How do I calculate age in years, months, and days?
   Use DATEDIF(A1, TODAY(),Y) & Years, & DATEDIF(A1, TODAY(), YM) & Months, & DATEDIF(A1, TODAY(), MD) & Daysfor a detailed breakdown.

3. Why is my age calculation showing an error in Excel?
   Errors may occur due to incorrect date formatting or if the birthdate is after today’s date ensure proper formatting and values.

4. Can I calculate age from a given date instead of today’s date?
   Yes, replace TODAY() with any reference date, like =DATEDIF(A1, B1, Y), where B1 contains the comparison date.

5. How do I automatically update the age every year in Excel?
   Using TODAY() in the formula ensures that the age updates dynamically each time the file is opened.

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