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How to calculate age in years and months and days from date of birth in Excel?

Author: Sun Last Modified: 2020-05-27

If there is a column of given birth dates, could you quickly calculate each age based on that given birth dates in years and months and days or in decimal number as below screenshot shown? This article, I will introduce the formula to handle this job.
doc calculate birth in year month day 1

Calculate age in years and months and days from date of birth

Calculate age in decimal number from date of birth

Calculate age in integer number from date of birth good idea3


Calculate age in years and months and days from date of birth

Select the cell which you will place the age, type this formula

=DATEDIF(A2,$F$2,"Y")&" Years, "&DATEDIF(A2,$F$2,"YM")&" Months, "&DATEDIF(A2,$F$2,"MD")&" Days"

Then press Enter key to get the result. Drag the auto fill handle down to the cells which need this formula.

In the formula, A2 is the birth date, F2 is the date of today.
doc calculate birth in year month day 2


Calculate age in decimal number from date of birth

Select the cell which you will place the age, type this formula

=DATEDIF(A2,$F$2,"Y")&"."&DATEDIF(A2,$F$2,"YM")

Then press Enter key to get the result. Drag the auto fill handle down to the cells which need this formula.

In the formula, A2 is the birth date, F2 is the date of today.
doc calculate birth in year month day 3


Calculate age in integer number from date of birth

If you just want to calculate the age in integer number, you can use the Calculate age based on birthday function to quickly handle it.

Kutools for Excel, with more than 300 handy functions, makes your jobs more easier. 

After free installing Kutools for Excel, please do as below:

1. Select the cell which you will place the age, click Kutools > Formula Helper > Formula Helper.
doc calculate birth in year month day 4

2. In the Formula Helper dialog, choose Calculate age based on birthday in Choose a formula section, then select the cell contains birth date into Date textbox, click Ok.
doc calculate birth in year month day 5

3. Now the age has been calculated in integer number, drag fill handle down to the cell for applying the formula.
doc calculate birth in year month day 6


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Comments (2)
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This comment was minimized by the moderator on the site
i have Age,month,days but i want to know date of birth in excel,how to get this?..
This comment was minimized by the moderator on the site
hi, you can use this formula =DATE(YEAR(DATE(A2,B2,C2))-A5,MONTH(DATE(A2,B2,C2))-B5,DAY(DATE(A2,B2,C2))-C5).
How to use this formula? List the today year, month, days in A2, B2, C2, then list the age, month, days in A5, B5, C5, choose a cell to place this formula.
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