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How to convert birthdate to age quickly in Excel?

For instance, you get a range of various birthdate data in Excel, and you need to convert these birthdate to display their exact age value in Excel, how would you like to figure out? This article lists some tips to convert the birth date to age in Excel easily.

Convert birthdate to age with formulas

Easily convert birthdate to age without remembering formulas


Easily convert birthdate to age with only several clicks:

The Calculate age based on birthday function of Kutools for Excel can help you quickly convert birthdate to age with only several clicks.

  • Select a blank cell, enable the function by clicking Kutools > Formula Helper > Calculate age based on birthday
  • Select the cell contains the birthdate you will calculate age based on.
  • Get the age.
  • Kutools for Excel: with more than 200 handy Excel add-ins, free to try with no limitation in 60 days. Download and free trial Now!


Convert birthdate to age with formulas


Method A: Convert birthdate to age with subtraction

Normally we figure out someone's age with current date subtracting the given birth date. So does it in Excel.

Step 1: Enter current date in a blank cell, such as 2016/4/7 in Cell B2.

Step 2: In another blank cell (says cell C2), enter the formula =INT((B2-A2)/365), and press the Enter key.

Method B: Convert birthdate to age with DATEDIF function

Some would like to apply the DATEDIF function to calculate the age. Enter the formula =DATEDIF(A2,NOW(),"y") in a blank cell, it calculates the age immediately after pressing the Enter key.

Method C: Convert birthdate to age with ROUNDDOWN function

Another function to convert the birth date to age is =ROUNDDOWN(YEARFRAC(A2, TODAY(), 1), 0), which will figure out a standard age, such as 27.

Method D: Convert birthdate to exact age with DATEDIF function

Sometimes exact age is requires, and you may want to know how many years, months, and days from the birth date to current date. The following formula can help you figure out:

=DATEDIF(A2,TODAY(),"Y") & " Years, " & DATEDIF(A2,TODAY(),"YM") & " Months, " & DATEDIF(A2,TODAY(),"MD") & " Days"

See the screen shot above, this formula will show you precise result, such as 23 Years, 8 Months, and 14 Days.

Formula is too complicated to remember? The Auto Text feature of Kutools for Excel can save the formula as an Auto Text entry for reusing with only one click in future! You just need to select the formula in the Formula Bar, and then add it to the specified auto text group in the Auto Text pane as below screenshot shown. Download the free trial with no limitation in 60 days.


Easily convert birthdate to age without remembering formulas

You can easily convert birthdate to age without remembering formulas with the Calculate age based on birthday function of Kutools for Excel.

Kutools for Excel : with more than 120 handy Excel add-ins, free to try with no limitation in 60 days.

1. Select a blank cell for locating the age. Then click Kutools > Formula Helper > Calculate age based on birthday. See screenshot:

2. In the Formula Helper dialog box, select the cell with the birth date you need to calculate in Date box, and then click the OK button. See screenshot:

3. After clicking OK in the Formula Helper dialog box, the age based on the birth date is populated in selected blank cell immediately. You can drag the Fill Handle to the cells you need to convert the birthdate to age. See screenshot:

Tip.If you want to have a free trial of this utility, please go to download the software freely first, and then go to apply the operation according above steps.


Combine multiple worksheets/workbooks into one worksheet / workbook:

Combine multiple worksheets or workbooks into one single worksheet or workbook may be a huge task in your daily work. But, if you have Kutools for Excel, its powerful utility – Combine can help you quickly combine multiple worksheets, workbooks into one worksheet or workbook

Kutools for Excel: with more than 200 handy Excel add-ins, free to try with no limitation in 60 days. Download and free trial Now!


Easily convert birthdate to age without remembering formulas

Kutools for Excel includes more than 120 handy Excel tools. Free to try with no limitation in 60 days. Download the free trial now!


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  • To post as a guest, your comment is unpublished.
    Arbaz Khan · 5 months ago
    Do not show the Detedif Formula in my Excel
    What to do Know?
  • To post as a guest, your comment is unpublished.
    elsie · 8 months ago
    if I have their id number how to get their age example their id no consist first 6digit is date of birth

    example 830901056252 , 830901 is date of birth.

    how to take calculate their age
    • To post as a guest, your comment is unpublished.
      crystal · 7 months ago
      Dear elsie,
      Please try this formula: =DATEDIF(DATE(IF(LEFT(A2,2)>TEXT(TODAY(),"YY"),"19"&LEFT(A2,2),"20"&LEFT(A2,2)),MID(A2,3,2),MID(A2,5,2)),TODAY(),"y"). A2 is the cell contains the ID number you want to calculate the age based on.
  • To post as a guest, your comment is unpublished.
    Usama · 8 months ago
    Thanks soooooo much dear....!
  • To post as a guest, your comment is unpublished.
    Alfred · 10 months ago
    please do i calculate the birth date from age
    • To post as a guest, your comment is unpublished.
      crystal · 10 months ago
      Good Day,
      This formula =DATE(YEAR(TODAY())-A1,MONTH(TODAY()),DAY(TODAY())) can help you to calculate the birthday from a given age based on today's date.
  • To post as a guest, your comment is unpublished.
    lep · 11 months ago
    Leap years! 365.25