Làm thế nào để chuyển đổi ngày sinh thành tuổi nhanh chóng trong Excel?

Ví dụ: bạn nhận được một loạt dữ liệu ngày sinh khác nhau trong Excel và bạn cần chuyển đổi những ngày sinh này để hiển thị giá trị tuổi chính xác của chúng trong Excel, bạn muốn tìm hiểu như thế nào? Bài viết này liệt kê một số mẹo để chuyển đổi ngày sinh thành tuổi trong Excel một cách dễ dàng.

Phương pháp A:
Chuyển đổi ngày sinh thành tuổi bằng công thức

Phương pháp B:
Dễ dàng chuyển đổi ngày sinh thành tuổi mà không cần nhớ công thức

Chuyển đổi ngày sinh thành tuổi bằng công thức

Các công thức dưới đây có thể giúp tính tuổi dựa trên ngày sinh trong Excel.

Chuyển đổi ngày sinh thành tuổi bằng hàm INT

Hàm INT có thể giúp tính tuổi của một người dựa trên ngày sinh đã cho, vui lòng thực hiện như sau.

1. Giả sử có hai cột chứa ngày sinh và ngày hiện tại riêng biệt.

2. Chọn một ô trống để xuất tuổi, nhập công thức bên dưới vào đó và nhấn Đi vào Chìa khóa. Chọn ô kết quả rồi kéo ô đó Điền vào Xử lý xuống để nhận tất cả các kết quả.

=INT((B2-A2)/365)

Chuyển đổi ngày sinh thành tuổi bằng hàm DATEDIF

Hàm DATEDIF dưới đây cũng có thể giúp bạn.

Chọn một ô trống để xuất tuổi, nhập công thức bên dưới vào đó và nhấn Đi vào Chìa khóa. Chọn ô kết quả rồi kéo ô đó Điền vào Xử lý xuống để nhận tất cả các kết quả.

=DATEDIF(A2,NOW(),"y")

Chuyển đổi ngày sinh thành tuổi bằng hàm ROUNDDOWN

Hãy thử hàm ROUNDDOWN để tính tuổi dựa trên ngày sinh như bên dưới.

=ROUNDDOWN(YEARFRAC(A2, TODAY(), 1), 0)

Hiển thị tuổi ở định dạng Năm + Tháng + Ngày với chức năng DATEDIF

Nếu bạn muốn hiển thị tuổi theo định dạng Năm + Tháng + Ngày, hãy thử hàm DATEDIF bên dưới.

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

Dễ dàng chuyển đổi ngày sinh thành tuổi mà không cần nhớ công thức

Bạn có thể dễ dàng chuyển đổi ngày sinh thành tuổi mà không cần nhớ các công thức với Trình trợ giúp ngày & giờ of Kutools cho Excel.

Trước khi áp dụng Kutools cho Excel, Xin vui lòng tải xuống và cài đặt nó trước tiên.

1. Chọn một ô trống để xuất độ tuổi. Sau đó nhấp vào Kutools > Công thức trợ giúp > Trình trợ giúp ngày & giờ.

2. bên trong Trình trợ giúp ngày & giờ hộp thoại, vui lòng cấu hình như sau.

2.1) Đi tới Tuổi tác chuyển hướng;
2.2) Trong Ngày sinh , chọn ô chứa ngày sinh mà bạn sẽ chuyển đổi thành tuổi;
2.3) Chọn Hôm nay tùy chọn trong Đến phần;
2.4) Chỉ định một loại kết quả từ Loại kết quả đầu ra danh sách thả xuống;
2.5) Nhấp vào OK .

Sau đó, độ tuổi được điền vào ô đã chọn. Chọn ô kết quả và sau đó kéo Fill Handle xuống hết cỡ để lấy tất cả các độ tuổi.

Chú thích: Nếu bạn muốn hiển thị tuổi ở định dạng Năm + Tháng + Ngày, vui lòng chọn Năm + Tháng + Ngày từ Loại kết quả đầu ra danh sách thả xuống. Và kết quả sẽ được hiển thị như ảnh chụp màn hình bên dưới. Nó cũng hỗ trợ hiển thị tuổi theo tháng, tuần hoặc ngày dựa trên nhu cầu của bạn.

Nếu bạn muốn dùng thử miễn phí (30 ngày) tiện ích này, vui lòng nhấp để tải xuống, và sau đó đi đến áp dụng hoạt động theo các bước trên.

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srinu · 1 years ago
How to convert age to date of birth
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Chaim Lederfeind · 1 years ago
Hi Catherine,

thank you so much for your formula! I am a related service provider for many students with various ages in a school setting. thanks to your formula, the student's age is in front of me during each session, and I am able to adjust session goals appropriately.
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sami muhammad · 1 years ago
thanks you so much very very good formula
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rg · 1 years ago
Just wanted to say THANK YOU!
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arbazalamkhan123456@gmail.com · 3 years ago
Do not show the Detedif Formula in my Excel
What to do Know?
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elsie · 3 years 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
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  crystal · 3 years 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.
  
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Usama · 3 years ago
Thanks soooooo much dear....!
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Alfred · 3 years ago
please do i calculate the birth date from age
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  crystal · 3 years 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.
  
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lep · 3 years ago
Leap years! 365.25
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Amelia · 3 years ago
Can you add an if clause so that if the DOB column is blank the AGE column will also be blank?
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SUBRAMANIAN K · 3 years ago
Thank you Catherine,
for the whole-hearted appreciation of my solution!
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Catherine · 3 years ago
I have used the following to calculate the age of children in my class.
=DATEDIF(B4,TODAY(),"Y")&"."&DATEDIF(B4,TODAY(),"YM")

with B4 being their date of birth. It produces the correct answer (eg) 9.11

They take tests 3 months later so I need in another cell to calculate '+3' months. But each time I do this I get 9.14 when I need it to say 10.2

Can anyone help.
Thanks
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  Catherine · 3 years ago
  
  YOU ARE AMAZING!!! It worked fantastically. I can now convert all the data for tests from the children in my class using this and I don;t have to work out their age each time. This makes my job much quicker and easier.
  THANKYOU!
  
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  SUBRAMANIAN K · 3 years ago
  
  Unclear my post went through or not, in response to Catherine's query.
  
  Repeat my formula which finds the difference between cell B4 contents and a date TODAY() advanced by 3 months:
  
  =DATEDIF(B4,DATE(YEAR(TODAY()),MONTH(TODAY())+3,DAY(TODAY())),"Y")&"."&DATEDIF(B4,DATE(YEAR(TODAY()),MONTH(TODAY())+3,DAY(TODAY())),"YM")
  
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  SUBRAMANIAN K · 3 years ago
  
  The DATEDIF formula used to give the Years and Months in a YY.MM format is understandable. However, each of the 2 components of this formula is a separate number, integer. So, adding 3 to the MM part will only give 14 if it is 11 before the addition. The formula does not know you are looking to set it up as a MONTH.
  
  So, if you get the DATEDIF between B4, and a date which is a valid date but 3 months after TODAY(), try the following formula, works for me and gave 10.2:
  
  =DATEDIF(B4,DATE(YEAR(TODAY()),MONTH(TODAY())+3,DAY(TODAY())),"Y")&"."&DATEDIF(B4,DATE(YEAR(TODAY()),MONTH(TODAY())+3,DAY(TODAY())),"YM")
  
  Please confirm it worked for you.
  
  Reply
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Reuben Mkumbo · 3 years ago
Hi! how to calculate running out date (ROD), if i have a date of birth(DOB). i want that, if enter DOB the ROD can display automatically. i.e i was born in 23 Jan 1998 i need to display automatically ROD. Please help me
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Reuben Mkumbo · 3 years ago
How to calculate the retied date, if have date of birth(DOB)? i want to display automatic once enter DOB, the retied date display
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Kim93 · 4 years ago
how can i get the year of birth??
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Arun · 4 years ago
[b]Very helpful....Now I knew how to convert date in text and count years. :roll: [/b]
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MAJID · 4 years ago
DEAR SIR KINDLY HELP TO FIND OUT MY DATE OF APPOINTMENT OF SERVICE , MY SERVICE LENGTH IS 24 YEARS 6 MONTH & 5 DAYS ON DATE 24 DECEMBER 2016 KINDLY SUGGEST FORMULA TO FIND OUT DATE OF APPOINTMENT I SHALL REMAIN THANKFUL TO YOU.
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Matt Viverette · 4 years ago
One should be careful using Method C, with the YEARFRAC() function, because of rounding error in computations involving leap years. You will calculate the incorrect age for people born in a leap year.

Example:
John Smith was born on 6/5/1932. 1932 is a leap year. Compute John Smith's age on 6/5/2002. We would say John Smith is 70 years old on his 70th birthday, 6/5/2002. However, because YEARFRAC(DATE(1932,6,5),DATE(2002,6,5), 1) computes to 69.99795627, adding ROUNDDOWN computes to 69. In fact, John is 70. I'm not sure if this is the best solution, but I've added a precise day to the computation, which I assume shouldn't affect other calculations because it is shorter than the formula assumes a day to be.

(1/365.2422) is a precise day when accounting for leap years

My adjusted YEARFRAC is:

YEARFRAC(DATE(1932,6,5),DATE(2002,6,5), 1)+(1/365.2422) which computes to 70.00069418 and when combined with ROUNDDOWN, gives 70.

Putting it all together according to the references in the article:
=ROUNDDOWN(YEARFRAC(A2, TODAY(), 1)+(1/365.2422), 0)
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SUBRAMANIAN K` · 4 years ago
Correction to what I just posted, the data is sitting in Cells B2:C13 (not A1:B12)
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Cedric · 4 years ago
What formula can I use to obtain the invoice amount for a specific month from a list of months with balances.
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  SUBRAMANIAN K` · 4 years ago
  
  Month Invoice Amount Assume cells A1 through B12 contain the 12 month
  Jan 810 names and amounts to invoive as at left.
  Feb 1200 For month Jan
  Mar 850 Invoie Amount 810
  Apr 930
  May 1250 The formula entered in the cell above here
  Jun 1300 framed above is
  Jul 1100
  Aug 820 =VLOOKUP(G3,$B$2:$C$13,2,FALSE)
  Sep 750
  Oct 875
  Nov 980
  Dec 1450
  
  Cedric, please confirm this answers your query
  
  Reply
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Kishore Tholana · 4 years ago
Thanks a lot for the formula. I got the desired result. Many thanks to the thread poster.

Regards,

KT
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Krishna Gupta · 4 years ago
6/4/1990 in A2

=TEXT(TODAY()-A2,"YY")&" Years, "&TEXT(TODAY()-A2,"mm")&" Months, "&TEXT(TODAY()-A2,"dd")&" Days"

use this simple formula and get answer as below :

26 Years, 03 Months, 15 Days
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ANNYONG · 4 years ago
my problem is that when I used the formula and drag it down it will just copy the value of the first cell. .

I have to enter it one by one.
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Wendy · 5 years ago
I want to find out the number of days from 8 May 2016 to 31 July 2016. Is there a formula for this?
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Ranil Somarathna · 5 years ago
This function is great. Very easy to understand. Thanks!
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Moon · 5 years ago
=DATEDIF(B10,NOW(),"Y")

Work great for me thank you!!!
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# Subramanian K` · 5 years ago
Responding to Beloved 2016-03-04:2016-03-04 in my yahoo mail box.Somehow, I thought they were not directed at me as I don't seem to have given details with commas, spaces, etc. I had only suggested the use of YEARFRAC() instead of DATEDIF function which i wasn't getting on my Excel. A clarification is welcome.
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Beloved · 5 years ago
Your teachings COULD be helpful but they are DEFINITELY NOT! Not because they are wrong per se but simply because 1. why do you use comma's (,) when Excel only accepts semi-colons (;) really beats me? 2. why do you put spaces in your examples when Excel NEVER accepts spaces?? Your work could be helpful but it confuses people instead. So, a perfectly good answer fails to produce the desired result practically on Excel because of YOUR carelessness. You spoil your own good work!...
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Velmurugan rengaraja · 5 years ago
It is amazing to understand and very very useful.
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Subramanian K · 5 years ago
I couldn't find DATEDIF() in my Excel but YEARFRAC() did it. Hope it is reliable, any comment anyone?
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  Thom H · 5 years ago
  
  Datedif is better, but was only introduced on more recent versions of Excel. I believe you can use it as far back as 2003, but it won't give you any autosum guidance (You can still use it though!)
  
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Subramanian K · 5 years ago
In my Excel, I could not get the DATEDIF() function for whatever reason. Yet, I got a YEARFRAC() function which seems to do the same. Hope it is reliable.

Any comment anyone?
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Narsing rao K · 5 years ago
how to convert date of birth in to worlds

02/02/1966
second february nineteen sixty six
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  Thom · 5 years ago
  
  I have a feeling date functions may do this in later versions of Excel i.e. =month() etc. If not, you'll need to create a table with the number in the first column i.e. 1-12 and months in the 2nd column Jan-Dec) then use vlookups so that the function can convert the numbers into the correct text. A lot of fun to be had there as I once wrote a sheet that did this very thing, there was further issues involved in using the correct affix i.e. nd rd st or th. Again, lookup tables did that and I was able to shorten the funtions calculations by using if statements instead but that was very fiddly and half the time I found myself trying to use PHP which would do the job in no time! Have a look around online as someone's likely done some VBA that'll do the trick or KUTools probably have something.
  
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Gatewarden · 5 years ago
I have about 100 cells with the calculated age as you done.
Is there any easy way to make groupings on all that are the age of 10 etc.

I have automated the document as we will have more people in all the time so I need automated groupings as well.

Any suggestions?

/Jacob
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Jaspreet · 5 years ago
Hello
Retirement age is 60 years and last date of each month and the formula works, but in our case if an employee's date of birth falls on 1st of any month then he/she will retire on the previous months last date. (eg. employee 1 DOB is 03/01/1960 then output needed is 28-02-2020 and employee 2 DOB is 03/02/1960 then 31-03-2020)
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Miranda Creed-Miles · 5 years ago
Brilliant tips!
Really worked well! If you want the age to display as a single number on Method B - just format the cell to 'Number' with no decimal points - it works!! Hurrah!!
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Channing · 5 years ago
Literally none of these worked. When I subtract, it just gives me another date like 03/03/1953
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  Steve Konz · 5 years ago
  
  Channing,
  
  Can you provide cell references and what data is entered in them along with your formula and that cell reference?
  
  First thought is you should format your result as a number instead of Date. That might be your issue.
  
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Atomicpetro · 5 years ago
Another question in regards to age. How can I get the age in cell B2 [age?] when I have in Cell A2 [26/06/1966] and in Cell B1 [2013] just the year. Thanks.
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  Steve Konz · 5 years ago
  
  Are you just trying to get the age they will be in the year of B1? If so, then just do B2 =(B1-(YEAR(A2)))
  
  If that's not what you are looking for, can you explain what it is you need in more detail?
  
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  Thom h · 5 years ago
  
  Swap the reference to cell b1 with =date then you build the date with three values: year, month and day. You reference b1 add the year then you'll just have to put 01 as the year and month. Or you could steal the dates from cell b2 using =month and =day
  
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guru · 5 years ago
It is Nice i think it good to learn to Excel 8) :roll: :P
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Steve Konz · 5 years ago
Here is one i have that accounts for leap days (well it excludes them pretty much)

=IF((DATEDIF((DATE((YEAR(C3)+(DATEDIF(C3,C2,"y"))),MONTH(C3),DAY(C3))),C2,"d"))=365,(DATEDIF(C3,C2,"y"))+((DATEDIF((DATE((YEAR(C3)+(DATEDIF(C3,C2,"y"))),(MONTH(C3)),(DAY(C3)))),C2,"d")-1)/365),(DATEDIF(C3,C2,"y"))+((DATEDIF((DATE((YEAR(C3)+(DATEDIF(C3,C2,"y"))),(MONTH(C3)),(DAY(C3)))),C2,"d"))/365))

C2 = Current Date - could use TODAY()
C3 = DOB
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Steve Konz · 5 years ago
Not sure if this was covered, but a lot of people right these and don't consider leap years when looking at the difference in days. Here is one I wrote that considers leap year rules (even for the 100 & 400 year rules)....

=IF((DATEDIF((DATE((YEAR(A2)+(DATEDIF(A2,A1,"y"))),MONTH(A2),DAY(A2))),A1,"d"))=365,(DATEDIF(A2,A1,"y"))+((DATEDIF((DATE((YEAR(A2)+(DATEDIF(A2,A1,"y"))),(MONTH(A2)),(DAY(A2)))),A1,"d")-1)/365),(DATEDIF(A2,A1,"y"))+((DATEDIF((DATE((YEAR(A2)+(DATEDIF(A2,A1,"y"))),(MONTH(A2)),(DAY(A2)))),A1,"d"))/365))

where A2 is the date of birth, and A1 is the current date (which could be replaced with TODAY() also.

Please let me know if there are any flaws in this or simpliar ways to calculate it.
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  Thom h · 5 years ago
  
  Excellent function, Steve. I believe datedif also does consider leap years :) yours looks very similar to something I wrote a couple of years ago add the client wanted to account for leap years and didn't trust datedif
  
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  Steve Konz · 5 years ago
  
  If I recall correctly, but datedif wasn't the issue regarding leap years. Once you get the number of days difference and you need to identify a specific date at which they will turn an age is when you need to factor in leap days. The second formula I wrote below does account for those days. If you don't consider that in the formula when you forecast you will be off by a few days.
  
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Chris · 5 years ago
Method D is exactly what I've been looking for, minus the day portion (easily removed). I've created an inventory of PCs for my company, and am using this to calculate hardware age based on purchase date. My question is this - is there a way to take this formula and make it so that I can essentially click a button to have it applied to a cell, and then just be able to then select the cell I want it to do the calculation on? Otherwise, I'm looking at having to copy/paste the formula to several hundred cells, and then go and manually change the target cell in each one.

Thanks.
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  Thom h · 5 years ago
  
  Just create a macro to take the selected cell, and dump the Function next to it, referencing that cell. You'll need to look in another thread to find macro guidance. It just drag the cell down
  
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Shephard · 5 years ago
Hello,
I have added the formula for age that works well. I was able to continue the formula down the entire column which is what I needed. The issue is that a computed "age" appears in each cell despite the fact that I have not filled in a birthdate. ie: everything below the correct calculations in the column reads 115 years as a default. Is there a way to make the age cell blank until a value is placed in the birthdate cell so as not to see ongoing "115's?" Thanks in advance~
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raksmey · 6 years ago
I really appreciate with this fomular.
:D
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KELSEY · 6 years ago
I like the "Method B" format when figuring out the age. I'm wondering if there is a way to have the years old and just the months old if younger than 2 using that format. Thanks!
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  Thom H · 6 years ago
  
  Hi Kelsey,
  
  Option B (DATEDIF()) only gives you the years as a number value - did you perhaps mean option D? I've added an IF statement to Option B, so that it only shows the months and yeards if the person is 2 or under:
  =IF(DATEDIF(A2,NOW(),"y")
  
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Krista · 6 years ago
Hello, I have a column in my spreadsheet for birth date, that is formatted as DD-Mon-YY (ie 11-Feb-03 for my son that was born on February 11, 2003). I used the =DATEDIF function referenced above and it is returning 115 Years, 2 Months, 11 Days. What is wrong and how do I correct it? Thanks for your help.
=DATEDIF(E13,TODAY(),"Y") & " Years, " & DATEDIF(E13,TODAY(),"YM") & " Months, " & DATEDIF(E13,TODAY(),"MD") & " Days"
Note: When I type =today() in a cell it is correctly listing 11-Mar-15 as today's date.
Also note: The regional settings in my control panel list short date as dd-MMM-yy, so I don't think this would be the problem.
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  Thom H · 6 years ago
  
  Hi Krista,
  That would be the length of time since Excel's callander started :P
  
  You're getting that because the cell you're referencing is blank - is you r son's DOB in Cell E13? Because that's the Cell it's calculating from.
  
  Possible fixes:
  - Your function contains errors, please see the corrected one below:
  =DATEDIF(E13,TODAY(),"Y") & " Years, " & DATEDIF(E13,TODAY(),"YM") & " Months, " & DATEDIF(E13,TODAY(),"MD") & " Days"
  
  - You need to use the format option to format it correctly as a date. i.e. to make it read in that format you'll need to go to the 'Custom' option under format and enter:[$-809]dd-mmm-yy;@ Under 'Type'
  
  - If you're just typing it in like that, it probably won't read it as a date, you need to enter it as 11/02/2003
  
  This will give you "12 Years, 1 Months, 1 Days"
  
  Thanks,
  
  Thom
  
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  Krista · 6 years ago
  
  Oops. LOL I had drafted this long note to you telling you it was still not working, when I noticed you were right...cell E13 was empty. My son's DOB is in cell E15. Oops. LOL Thanks for your kind help. It's working now. :) Have a great day!!
  
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  mario · 5 years ago
  
  Krista Check your E13 Column it must be blank, thats why you get 115 Years, change e13 to correct column number
  
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Tanja · 6 years ago
Hi,

How do I convert fx 25102002 into a date and than age?
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  Thom H · 6 years ago
  
  Hi Tanja,
  
  I'm assuming that would be the 25th October 2002? Is the FX part of the box? If so, I'd start with =right(A1,8) which would give you the last eight digits from cell A1, so if Cell A1 contained "fx 25102002" it would simply return "25102002". Now to convert that 8 digit string into a palatable date, I'd use the =date() function. I've done one for you, you just need to switch the A1 with the cell that contains your function =DATE(RIGHT(A1,4),RIGHT(LEFT(A1,4),2),LEFT(A1,2))
  Thanks, Thom
  
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Kimberley Woodward · 6 years ago
hi what would the formula be to work out a child's date of birth in exact months (so 24/02/13 = 24mths?)

I am an early years teacher and we work in months not years and months.

Can you help?

Kimberley
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  Thom H · 6 years ago
  
  Hi Kimberley,
  Datedif would do that for you, Just use =DATEDIF(A1,TODAY(),"m") Assuming the DOB is in Cell A1.
  Thanks,
  Thom
  
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rowena · 6 years ago
Hi thanks! ;-)
Its abig help for me having your tips....
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B Kumar · 6 years ago
Hi Thom,
Kindly Help me i am not understand this formula.
Please calculate my date of birth explained me my date of birth 15/09/1988
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  Thom H · 6 years ago
  
  Hi B Kumar,
  I'm afraid I don't follow your question. Could you please clarify for me?
  Thanks, Thom
  
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Carlos Somarriba · 6 years ago
Great!!! All formulas works perfect. Thank you so much.
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