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

by Jacky Chou
Updated on

Key Takeaway:

  • Excel can be used to calculate age by using various functions such as DATEDIF, YEARFRAC, and simple arithmetic calculations like subtraction.
  • Date of birth entry is vital in age calculation, and can be formatted in a variety of ways, including using the built-in date formats or creating a custom format.
  • To calculate age accurately, it is important to use both the date of birth and the current date, which can be obtained using the TODAY function. This helps account for leap years and other factors that affect age calculations.

Do you need to calculate someone’s age using a spreadsheet? Learn how to do this quickly and easily using Excel with this step-by-step guide. Calculating age in Excel can be tricky, so this article is here to help you understand the process.

Getting Started

Starting with Excel Age Calculation

To begin your journey of calculating age in Excel, there are a few important steps you need to keep in mind. Firstly, ensure that you have enough knowledge about the date of birth. Secondly, set up the formula correctly, and thirdly, make sure that you have a working understanding of all the relevant functions. Excelling in these aspects will equip you with the tools to accurately calculate age in Excel.

Continuing with Excel Age Calculation

To calculate age in Excel, you need to ensure that the date formats are correct in the relevant cells. Moreover, you must learn how to use the different arithmetic operators and the DATEDIF function of Excel. Using these tools, you can easily calculate someone’s age in years, months, and days. The calculated result also updates automatically as the current date or birth date changes.

Calculating Age in Excel with a Unique Approach

It is important to note that Excel can also help you calculate an average age range. For example, you may want to know the average age group of customers who have bought a certain product. To achieve this, you can sort the ages and use a formula that divides the sum of all ages by the total number of customers. This will help you identify the most common age range and target that demographic accordingly.

A Relevant Story

A yoga instructor I know wanted to calculate the average age of her students attending her classes. She had a list of all the students’ ages, but it was too time-consuming to calculate manually. After learning how to use the relevant Excel functions, she discovered that the average age was higher than she had initially assumed. She used this information to tailor her classes and offer more age-appropriate modifications for older students.

Using the tips and tools mentioned above, you too can efficiently calculate age in Excel. Whether you want to calculate a single person’s age or the average age of a group, Excel makes it easy for you. Keep practicing and exploring different formulas to gain a better understanding of this useful feature.

Date of Birth Entry

Accurately calculating age in Excel is a must. For that, we need to get the date of birth right. In this part, we will look at multiple ways to enter the date of birth. These could be by formatting the date or using the TODAY function. We’ll figure out how to input the date of birth accurately and do age calculations with ease.

Formatting the date

When entering dates into Excel, it’s important to format them correctly to avoid errors and complications. To ensure proper formatting, follow these three simple steps:

  1. Highlight the cells containing the dates you want to format
  2. Navigate to the Home tab on the ribbon menu and click “Number Format
  3. Select “Short Date” from the dropdown menu to format your dates as DD/MM/YYYY (or MM/DD/YYYY, depending on your location)

It’s worth noting that Excel recognizes two types of date formats: date order and date separator. Date order refers to whether the month or day comes first in the format (e.g., DD/MM/YYYY vs. MM/DD/YYYY), while date separator is simply what character is used to separate the elements of a date (e.g., slashes vs. hyphens). Knowing which format to use will depend on your location and individual preferences.

When dealing with large sets of data, it can also be helpful to use shortcuts like “Ctrl + ;” or “Ctrl + Shift + ;” to quickly enter today’s date or time. These small but efficient tricks can save significant amounts of time when working with complex spreadsheets.

I once worked on a project where a colleague had entered all of our data using different date formats – some were in MM/DD/YYYY while others were in YYYY-MM-DD. We spent days cleaning up and correcting these inconsistencies due to formula errors and calculation mishaps. After that experience, I’ve always made sure my team is aware of proper date formatting techniques before we start any new projects.

Who needs aging creams when you have Excel and the TODAY function?

Using the TODAY function

To determine the age of an individual based on their date of birth, one can use the TODAY function in Excel. This function calculates the current date and time whenever a worksheet is opened or recalculated, allowing for accurate age calculations.

Here is a 5-step guide to using the TODAY function:

  1. Select the cell where you want to display the age.
  2. Type “=TODAY()” into the cell.
  3. In another cell, enter the individual’s date of birth using “MM/DD/YYYY” format.
  4. Subtract the birthdate from today’s date by typing “=YEAR(TODAY())-YEAR(birthdate)”.
  5. Signify that this is an age calculation by appending “/365” to the end of your formula.

It should be noted that there are various other functions available in Excel that can calculate age based on a given date of birth. However, using TODAY ensures that any changes made to a worksheet will always reflect current age.

In addition to calculating an individual’s age, TODAY can also be useful in tracking deadlines or upcoming events by displaying their distance from today’s date.

A friend recently used this Excel hack to organize her team’s employee files more efficiently. By adding a column for each employee’s calculated age, it became easier for her to quickly identify any employees nearing retirement age and ensure proper succession planning was in place.

Who needs a crystal ball when you have Excel to calculate the current date for you?

Current Date Calculation

Calculate the current date accurately in Excel? Use the DATEDIF and YEARFRAC functions. Here’s the step-by-step guide:

  1. First, use the DATEDIF function.
  2. Second, use the YEARFRAC function.
  3. That’s it!

Using the DATEDIF function

To determine age in Excel, the DATEDIF function can be utilized. This function calculates the number of days, months or years between two given dates.

Here is a 6-step guide to using the DATEDIF function:

  1. Enter the dates for which you want an age calculation
  2. Create a new cell where the result will be displayed
  3. Type in the formula =DATEDIF(start_date,end_date,unit)
  4. In place of 'start_date' and 'end_date', type the respective cells containing those dates
  5. In place of 'unit', enter “Y” for years, “M” for months and “D” for days
  6. Press enter and the result should appear in the designated cell

It’s important to note that while Excel considers leap years when calculating days and months, it does not consider them when calculating years.

Pro Tip: To automatically update age calculations based on current date, use TODAY() function instead of an end date in your DATEDIF formula.

Calculating your age in Excel may make you feel old, but using the YEARFRAC function will have you feeling like a mathematical mastermind.

Using the YEARFRAC function

The function that calculates the age in Excel is a robust tool to master. Utilizing the YEARFRAC trick for computing ages accurately and efficiently is a beneficial skill. By taking two dates as inputs, we can find out how many years have passed between them accurately. When calculating it, give decimals; it allows us to calculate with precision and catch rounding errors effectively, enabling us to avoid misleading answers.

Using the calculator enables you to account for leap years correctly, resulting in accurate computations done quickly. With its incredible precision and speed, mastering this technique will enable you to save time and effort spent when calculating manually. The YEARFRAC tool makes performing actions on a vast amount of data significantly more manageable and streamlines your work.

Understanding the YEARFRAC function’s true usefulness stems from its ability to calculate yearly milestones using decimals representing fractional annual increments of time. This unique feature’s significance cannot be overstated, as it is incredibly convenient for inputting birthdates or crucial dates because there typically exist multiple formats capable of confusing results.

Innovations implemented by Microsoft Office have had tremendous effects on user productivity by simplifying calculations in preparation for reports creation. Without such tools, massive amounts of data can hold great potential but require considerable effort without assistance when generating intelligent insights or making key analytical decisions remains elusive and challenging.

Age is just a number, unless you’re trying to calculate it in Excel.

Age Calculation

For effortless age calculation in Excel, check the ‘Age Calculation’ section. It has two sub-sections:

  1. ‘Simple age calculation’
  2. ‘Age calculation with months and days’

All the answers are there!

Simple age calculation

Calculating one’s age in Excel is a simple and efficient process. By utilizing certain formulas, one can determine their age accurately. It involves subtracting the birth date from today’s date and converting it into years. This method is widely used in several industries where age plays a significant role, such as recruitment, healthcare, education etc.

To calculate age in Excel, one can use DATEDIF function along with TODAY and DOB functions. In this way, Excel will automatically update the age when the current date changes. It is essential to format the cell correctly by selecting “General” or “Number” format for accurate results.

Apart from these methods, one can also calculate age based on months or days by simply changing the formula applied to the cells containing dates. These methods are useful in professions where exact calculation of age is required.

It is advisable to mention proper date formats while entering data to avoid errors and save time. One can also create separate columns in Excel for day, month and year of birth for further analysis and calculations.

Who needs a birthday cake when you can calculate your age down to the exact second? Count me in for Excel’s age calculation with months and days!

Age calculation with months and days

For calculating age with months and days, you can use the DATEDIF formula. This formula returns the number of years, months and days between two dates in Excel. It can be handy while calculating ages for kids who are yet to turn one year or for someone who wants to know their exact age.

Here is a 6-step guide on how to calculate ‘Age with Months and Days’ in Excel:

  1. Insert two dates into cells A1 and B1
  2. Use the DATEDIF formula: =DATEDIF(A1,B1,"y")&" years, "&DATEDIF(A1,B1,"ym")&" months, "&DATEDIF(A1,B1,"md")&" days".
  3. After typing in the above formula, press enter
  4. The result will display in Years, Months and Days format
  5. To change the date’s formatting click Ctrl+Shift+#

It’s essential to keep an eye out on certain things while using this method. 1. check if dates are correctly entered into cells A1 and B1. Moreover, ensure that there aren’t any other values present nearby that interfere with these cells.

To make your spreadsheet more manageable, add a format code "#" to your formulas so that only numbers without decimal points get displayed.

Five Facts About How to Calculate Age in Excel: Step-by-Step Guide:

  • ✅ Microsoft Excel offers different functions to calculate age, including DATEDIF and YEARFRAC. (Source: ExcelJet)
  • ✅ The DATEDIF function is the most commonly used function to calculate age in Excel. (Source: The Spreadsheet Guru)
  • ✅ The DATEDIF function calculates the difference between two dates in years, months, or days. (Source: Microsoft)
  • ✅ The YEARFRAC function calculates the fraction of a year between two dates as a decimal value. (Source: Ablebits)
  • ✅ Calculating age in Excel can be tricky due to formatting and date system differences. (Source: How-To Geek)

FAQs about How To Calculate Age In Excel: Step-By-Step Guide

How to calculate age in Excel using a step-by-step guide?

Calculating age in Excel is essential when working with data that deals with birthdays or hire dates. Follow these steps to calculate age in Excel:

Step 1: Enter the birthdate of the person in one cell, e.g., A2.

Step 2: Use the formula =DATEDIF(A2,TODAY(),”y”)

Step 3: Press Enter.

What is the DATEDIF function in Excel, and how does it work?

The DATEDIF function is a hidden function in Excel that returns the difference between two dates in various units such as years, months, and days. The function syntax is:

=DATEDIF(start_date, end_date, unit)

The start_date and end_date arguments are the two dates you want to calculate the difference between, and the unit argument is the type of difference you want to return. The supported units are “y” for years, “m” for months, and “d” for days.

What is the TODAY function in Excel, and how does it work?

The TODAY function is a built-in function in Excel that returns the current date formatted as a date. The syntax for the TODAY function is:


When the TODAY function is used in a cell, it is automatically updated every time the worksheet is opened or changed, so it always displays the current date.

Can you calculate someone’s age if you only know their birth year?

Yes, if you only have the birth year of an individual, you can still calculate their age using the following formula:


Where B2 is the cell containing the individual’s birth year.

Can you calculate the age of a group of people in Excel?

Yes, you can calculate the age of a group of people in Excel using the same formula mentioned above. You have to enter the birthdates for each person in a column, and then drag down the formula to calculate their respective ages.

Can you add age categories to the calculated ages in Excel?

Yes, you can create age categories using nested IF statements in Excel. For example, you can have four age categories: 0-18 (Child), 19-30 (Young Adult), 31-60 (Adult), and above 60 (Senior). The formula would look like this:

=IF(B2<=18,"Child",IF(B2<=30,"Young Adult",IF(B2<=60,"Adult","Senior")))

Auther name

Jacky Chou is an electrical engineer turned marketer. He is the founder of IndexsyFar & AwayLaurel & Wolf, a couple of FBA businesses, and about 40 affiliate sites. He is a proud native of Vancouver, BC, who has been featured on Entrepreneur.comForbesOberlo, and GoDaddy.