Key Takeaway:
 Automatic Age Calculation: Excel offers a variety of powerful tools to calculate age automatically, including the DATEDIF and YEARFRAC functions. These tools can be used to quickly and accurately calculate age, without the need for manual calculations.
 Date Formatting in Excel: Understanding how to format dates in Excel is crucial for accurate age calculation. Excel offers a variety of default and custom date formats to choose from, and troubleshooting date formatting issues can ensure accurate data entry.
 Advanced Age Calculation: In addition to the basic age calculation functions, Excel users can also leverage advanced calculation methods for comprehensive age calculation. These methods include calculating age in months and days, as well as compound age calculation using dynamic formulas.
Calculating age accurately can be complex and timeconsuming. Do you want to know an easier way to get the job done? Excel provides an efficient solution that takes only a few steps. With this guide, you’ll quickly learn how to calculate age in Excel.
Defining Age Calculation
To define age calculation in Excel, follow these 5 steps:
 Subtract the birthdate of an individual from the current date.
 The result will be in days.
 Divide the number of days by 365 (no leap years in between).
 Round off the quotient to a whole number.
 Insert a formula that updates the age every year.
Knowing how to calculate age in Excel is important. It saves time and prevents errors. It also helps us track life milestones like retirement and health checkups.
Someone I know kept missing doctor’s appointments because they calculated their own age wrong! This could have been avoided if they knew about defining age calculation in Excel.
Next, we will look at Reasons for Using Excel to Calculate Age.
Reasons for Using Excel to Calculate Age
Excel is great for organizing and analyzing data. Calculating age is one common use. Here are a few reasons why you should use Excel:

Inputting birthdates and current dates is super easy. Calculating age manually for multiple individuals takes time and effort – with Excel it’s done in no time!

Excel offers versatile ways to calculate age. You can choose to include years, months and days – or just one of those. With Excel’s mathematical functions, you can tailor it to your needs.

You can do more than just calculating age. Sort by age or filter data based on age? No problem.

When new information is available, updating is simple. If birthdate changes or new data needs updated calculations, Excel can handle it.

With automation, accuracy is improved. No need to worry about human error causing discrepancies.
To get started, follow this 5step guide:

Open MSExcel program.

Select cell where formula will be placed.

Type =DATEDIF(“birthdate”, ‘today date’, “unit”)

Replace “birthdate” with relevant cell containing date of birth.

Replace ‘today date’ with today’s date.
Excel helps you save time with streamlined flexibility and accuracy – don’t miss out! In our next section, we’ll discuss the importance of accurate age calculation in Excel. Stay tuned!
Importance of Accurate Age Calculation in Excel
Calculating age in Excel is essential. Errors in calculation can have serious consequences. Wrong age values lead to wrong decisions. Here’s a 5step guide to ensure accuracy:
 Identify date of birth cell.
 Find current date cell or insert manually.
 Define formula for calculating age with cell references.
 Specify cell format: no decimals.
 Test formula with different dates.
Inaccurate age can cause problems in various industries. A passport application may be denied if the age is wrong. Incorrect employee ages can lead to wrong payments.
Accurate age calculation is important in personal life too. Social media platforms target users based on age and interests. Wrong age may hinder appropriate content.
Inaccurate results portray unprofessionalism. To avoid FOMO, enter correct info. This guarantees access to relevant features.
Understand Excel date formats and formatting. This will help you manipulate dates without making mistakes when calculating age.
Excel Date Formats and Formatting
Excel date formatting can be tricky. But, it’s vital to get it right if you want exact calculations of age, etc. In this article, I’ll share my knowledge on Excel date formats. We’ll review the available formats. Plus, learn which one you should pick for your needs. Also, find out how to customize date formats in Excel for your specific needs. Lastly, I’ll provide troubleshooting tips, if you have any issues with date formatting. Let’s explore the world of Excel date formatting!
Image credits: pixelatedworks.com by Joel Washington
Understanding and Choosing Date Formats
Choosing the correct date format in Excel is very important. It helps data input and calculations to be accurate. There are standard, short, medium and long date formats, and custom formats.
Let’s look at a table with examples. The table has four columns – Date Format Type, Description, Example Result (with today’s date), and Result Explanation. The first column explains the type of format used. The second column gives a description. The third column shows the output with today’s date. The fourth column explains how Excel got its result.
Date Format Type  Description  Example Result (with today’s date)  Result Explanation 

Standard  Displays date and time  6/23/2021 12:45:30 PM  The default format for dates and times in Excel 
Short  Displays abbreviated month, day, and year  6/23/21  Ignores time values 
Medium  Displays month, day, and year  Jun 23, 2021  
Long  Displays day of the week, month, day, and year  Wednesday, June 23, 2021 
When deciding a date format, you should think about the type of data you will be using. If you often use numbers for dates or times, the “General” format can be useful. It treats numbers over 12 as months.
You may need a custom format if you have clients in different time zones. With over thirty variations, you can pick one that suits your region.
I once used the wrong date format in a report. It caused confusion between me and management when the figures didn’t add up.
Let’s now look at how to customize date formats in Excel.
How to Customize Date Formats in Excel
Customizing date formats in Excel can help you present data more meaningfully. Here is a 6step guide:
 Pick the range of cells with date values.
 Rightclick and select “Format Cells.”
 Under the “Number” tab, select “Date” from the “Category” list.
 Pick the desired date format or click “Custom” to create one.
 Click “OK” to apply changes.
 Now you can customize your date formats quickly!
If you have issues with dates, there are solutions. Check that the cell format matches the source data. If you want to display dates as text, type an apostrophe before entering the date. Also, use conditional formatting to highlight dates in certain ranges. This makes it easier to spot trends and patterns.
In the next section, we’ll discuss date formatting problems in Excel.
Troubleshooting Date Formatting Issues
To check the format of each entry, use Custom Cell Formatting (Ctrl+1). Several commonly used formats are seen in the ‘Format Cells’ dialogue box. You can also use preformatted templates for common date formats. Understand the date system used in the workbook – the 1900 or 1904 system.
Regional settings in your OS can affect date formats. Look out for errors caused by decimals or commas. Ensure you select the correct regional settings while setting up Excel and keep them consistent.
If data is imported from other sources (e.g. CSV files or databases), verify all columns match their data types before import. Mistakes or formatting errors in the data can cause it to be read as text. To fix this, convert them into excelreadable dates with an appropriate formula.
If troubleshooting doesn’t solve the issue, ask colleagues with more experience or search online for solutions. Also, practice makes perfect! The more familiar you get with suggestions and formulas, the easier it will get.
Now that you know how to handle Date Formatting Issues, let’s move on to Simple Age Calculations in Excel.
Simple Age Calculations in Excel
Ever struggle to work out age in Excel? You’re not alone. There are simple functions in Excel that can help. In this article, we’ll look at 3 popular functions.
 Firstly, the DATEDIF function is hidden but it can be used for age calculations.
 Secondly, the YEARFRAC function helps with fractional age differences.
 Finally, the TODAY function can be used to calculate age from a birthdate.
By the end, you’ll understand age calculations in Excel.
Image credits: pixelatedworks.com by David Washington
DATEDIF Function for Calculating Age
The DATEDIF function in Excel is useful for calculating someone’s age. It’s easy to do with 6 simple steps:
 Open a new cell and type “=” to start the formula.
 Type “DATEDIF(” inside the formula.
 Enter the birthdate in the format “YYYY/MM/DD,” followed by a comma.
 Enter today’s date in the same format, followed by another comma.
 Put quotation marks around “Y” or “M” to specify what result you want. Then, close with a parenthesis “)”. For example, “=DATEDIF(A2,TODAY(),”Y”)” gives you someone’s age in years from the birthdate in cell A2.
 Press enter.
This formula is not always accurate as it only counts full years or months.
The DATEDIF function is helpful for working with dates and times in Excel. It can be used to calculate anything from employees’ length of service to warranty expiration dates.
Pro Tip: To get more accurate time counts between specific dates or times in Excel, use the NETWORKDAYS.INTL function instead of subtracting one date from another.
Now, let’s look at how to calculate an age in fractions of years using the YEARFRAC function in Excel.
YEARFRAC Function for Age Calculation
The YEARFRAC Function is a neat way to calculate age in Excel. Here’s how to utilize it:
 Open a fresh or existing Excel spreadsheet.
 Enter the birthdate of the person in the first cell.
 In the second cell, enter “=YEARFRAC(birthdate,TODAY())”.
 Hit Enter to compute the age.
 Format the age as a whole number. Select the cell and go to Format Cells > Number > Number.
YEARFRAC Function returns a decimal value corresponding to the number of days between two dates, based on a 360day year. For instance, if someone’s birthdate is on January 1st and today is June 30th, the YEARFRAC function gives 0.5 (meaning half a year has elapsed since their birthday). Multiply this decimal with 360 to get an approximate number of days since their last birthday, then divide by 365 to get the exact age.
This method is handy, especially for bulk data where manual calculations would be strenuous and prone to error. Some suggestions to use this method effectively are:
 Organize data in separate columns.
 Use data validation for accurate input of birthdates.
 Update all ages based on today’s date periodically to guarantee accuracy.
Next up: Age Calculation from Birthdate Using TODAY Function.
Age Calculation from Birthdate Using TODAY Function
Do you want to know how to calculate age in Excel? Use the TODAY Function! Here’s a simple guide:
 Enter the person’s date of birth.
 Use the formula =TODAY() to find today’s date.
 Subtract the date of birth from today’s date using the formula =TODAY()[Date of Birth].
 This will give a number which is the number of days between today’s date and the birthdate.
 To convert to years, divide it by 365.25 (average length of a year).
 Round down with FLOOR for an accurate representation of age.
This method of ‘age calculation from birthdate using today function’ is helpful. Don’t forget that FLOOR is necessary, because not all years have the same number of days. Also, this method calculates age based on calendar years, without accounting for leap years.
Start using this method now to accurately calculate someone’s age in Excel and save time. Additionally, stay tuned for our upcoming section ‘Advanced Age Calculations in Excel’, which will explore more complex formulas and functions useful when working with dates and ages in Excel.
Advanced Age Calculations in Excel
Advanced age calculations are easy with Excel. We’ll explore four subsections:
 First, calculate age in months with DATEDIF.
 Second, calculate age in days with DATEDIF.
 Third, calculate age in years and months with nested functions.
 Lastly, use dynamic formulas for compound age calculations.
Let’s go!
Image credits: pixelatedworks.com by David Woodhock
Age Calculation in Months Using DATEDIF Function
Text:
Select an empty cell for age display.
Start the formula with ‘=’.
Type “DATEDIF” and open a parenthesis.
Enter the person’s birthdate in the first argument.
Add today’s date or another date for age calculation in the second argument.
Type ‘m’ as third argument and close parentheses (“,m)”).
That’s how you calculate age in months accurately.
The DATEDIF Function is very versatile. It offers different unit types to calculate age. Here, ‘m’ is used to work out age in months.
This method helps in tracking age without manually counting months between two dates. Plus, it’s automated – saves time and reduces errors.
You can add conditional formatting based on age band for better visuals.
Also, make sure all cells used have uniform formats before formulas.
The next step is computing age down to days – ‘Age Calculation in Days Using DATEDIF Function.’
Age Calculation in Days Using DATEDIF Function
Enter the birthdate of someone in one cell (Ex. A2). Then, type today’s date in another cell (Ex. B2).
Use =DATEDIF(A2,B2,”d”) to calculate the age of the individual in days. This is useful for events or appointments based on age. It is also great for insurance policies.
However, some functions give complete days only. To get more precise results, use the advanced age calculation methods. An example of this is calculating age in years and months with nested functions. This yields very accurate results.
Calculating Age in Years and Months Using Nested Functions
To accurately calculate someone’s age in years and months, start by entering their birthdate. Put the following in the cell where you want the age to appear: =DATEDIF(birthdate, TODAY(), “y”) & ” years, “
This first function calculates the number of years between the birthdate and today. Add another DATEDIF function after the comma: =DATEDIF(birthdate,TODAY(),”ym”) & ” months”
This second function calculates additional months beyond whole years. You can use an IF statement to adjust the output.
Compound Age Calculation using Dynamic Formulas is useful for complex calculations.
Compound Age Calculation using Dynamic Formulas
Calculating ages in Excel can be tricky with different dates and years. But, using dynamic formulas you can easily calculate compound age. Here’s a 5step guide:
 Enter DOB (date of birth) in a cell without quotation marks.
 Enter =DATEDIF(DOB,TODAY(),”y”) to calculate the number of years from DOB to today’s date.
 To include months too, add =DATEDIF(DOB,TODAY(),”ym”) & ” month(s)”.
 To include days as well, enter =DATEDIF(DOB,TODAY(),”yd”) & ” year(s), ” & DATEDIF(DOB,TODAY(),”ym”) & ” month(s), ” & DATEDIF(DOB,TODAY(),”md”) & ” day(s)”.
 Format the cell with the calculation as a number or general format.
The ‘DATEDIF’ function subtracts DOB from today’s date and returns a whole number for total elapsed years. Adding ‘m’ as an argument at the third parameter of ‘DATEDIF’ calculates years and months. Adding ‘d’ as an argument in both second and third parameters calculates years, months and days.
Be aware that some versions of Excel may have issues with recalculating dates entered using text formatting in cells. The Balance Small Business found that Excel’s ability to calculate aging contextually is useful for financial modeling, inventory forecasting, or marketing analytics.
Some Facts About How To Calculate Age in Excel:
 ✅ The formula for calculating age in Excel is =DATEDIF(birthdate,TODAY(),”Y”). (Source: Exceljet)
 ✅ Ensure the birthdate is entered in the correct format (mm/dd/yyyy) for accurate age calculation in Excel. (Source: Ablebits)
 ✅ Excel can also calculate the number of exact days between two dates using the =DATEDIF(startdate,enddate,”D”) formula. (Source: Excel Easy)
 ✅ Excel has several other formulas and functions for date and time calculations, including calculating time differences and working hours. (Source: Microsoft)
 ✅ Excel can be used to create charts and graphs to visualize age data and trends. (Source: Excel Campus)
FAQs about How To Calculate Age In Excel
How do I calculate age in Excel?
To calculate age in Excel, you can use the DATEDIF function. First, enter the date of birth in one cell and the current date in another cell. In a third cell, use the DATEDIF function with the syntax =DATEDIF(Birthdate,TODAY(),”Y”). This will give you the person’s age in years.
How can I calculate age in Excel using different units of time?
You can modify the DATEDIF function to calculate age in different units of time. For example, to calculate age in months, use the syntax =DATEDIF(Birthdate,TODAY(),”M”). To calculate age in days, use the syntax =DATEDIF(Birthdate,TODAY(),”D”).
What do I do if the DATEDIF function returns an error?
If the DATEDIF function returns an error, it could be because the date format is not correct. Make sure that both the birthdate and current date are in date format. If they are, try changing the format of the third cell to general or number format.
How can I calculate age for a group of people in Excel?
You can use the same formula to calculate age for a group of people in Excel. Simply enter each person’s birthdate in one column and the current date in another column. Then, use the DATEDIF formula in a third column to calculate age for each person.
Is there another way to calculate age in Excel?
Yes, you can also use the YEARFRAC function to calculate age in Excel. First, enter the birthdate in one cell and the current date in another cell. In a third cell, use the syntax =INT(YEARFRAC(Birthdate,TODAY())). This will give you the person’s age in years.
Can I calculate age using Excel on a Mac?
Yes, you can calculate age using Excel on a Mac. The DATEDIF and YEARFRAC functions work the same way on a Mac as they do on a PC. Simply follow the same steps to calculate age in Excel on a Mac as you would on a PC.
Nick Bilton is a BritishAmerican journalist, author, and coder. He is currently a special correspondent at Vanity Fair.