Calculate Age in years based on Date Of Birth and current Date in SQL Server

Hiii,

I want to calculate 18 years plus date from birthdate .

e.g=

if birth date is 12 /03/1993 the it will sho the date when the 18 years age is complet date.if bitrthdate is 29 feb 1995 then it show 18 years plus date with formulating leap year.