Perform Age calculation using Formula Columns in Dataverse / Dynamics 365

Below we have created a new field of Data Type Formula and Formula Data Type as Whole Number

Specify the following formula.

RoundDown(DateDiff(birthdate, UTCNow(), TimeUnit.Days) / 365.25, 0)

• DateDiff calculates the difference in days between birthdate and current UTC Date.
• Dividing by 365.25 takes care of converting the days to years, considering the leap year into account.
• Roundown takes care of rounding the result to a nearest integer.

Below we see the field in action.

UTC current date is 10th Wednesday July 2024 for the below example.

Also checkout the helpful video –

and the forum – https://powerusers.microsoft.com/t5/Microsoft-Dataverse/Calculating-age-in-CDS-entity/td-p/495528

Hope it helps..