# How to calculate age from date of birth

This post explains that how to **get age from the date of birth** in a Cell. How to **calculate birthdate to age** using formulas in Excel. How to convert the birth of date to age quickly in Excel.

## Calculate age from date of birth

If you have a table that contains birthdate data in a range of Cells in Excel, and you want to get the age from those people’s birthdate value, you can use a combination of the INT function, the TODAY function to create an excel formula .

You can use the TODAY function to get the current date and then is subtracted to the value of birthdate and then the number is divided by 365 to get the exact age value, last, using the INT function to convert the age value to the integer.

Assuming that you want to calculate date of birth to age in Cell B2, you can use the following formula:

=INT((TODAY()-B2)/365)

**Let’s see how this formula works:**

**=TODAY()**

This formula returns the current date.

**=(TODAY()-B2)/365**

The current date subtracts the date of birth to get the number of days of birth. The returned number is divided by 365 (one year) to get the exact numbers of years. Then it goes into the INT function as its argument.

**=INT((TODAY()-B2)/365)**

This formula will round a decimal down to an integer. So you can get the age from the date of birth.

## Calculate age from date of birth with DATEDIF function

You can also create a formula based on the DATEIF function and TODAY function or NOW function. The DATEDIF function can return the number of complete year between the current date and birth date. So you can write down the following formula to convert date of birth to age quickly:

=DATEDIF(B2,TODAY(),"Y")

**OR**

=DATEDIF(B2,NOW(),"Y")

** **

## Calculate age from date of birth with YEARFRAC function

You can also create an excel formula based on the INT function or ROUNDDOWN function, the YEARFRAC function and the TODAY function to calculate age from birth of date.

The YEARFRAC function can be used to calculate the fraction of the year represented by the number of whole days between the date of birth and the current date. Then you need to use the INT function or ROUNDDOWN function to round down the number returned by the YEARFRAC function to the integer value.

So you can write down the following formula:

=INT(YEARFRAC(B2, TODAY(), 1))

**OR**

=ROUNDDOWN(YEARFRAC(B2, TODAY(), 1),0)

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