The formula to calculate your college graduation date is: Your starting semester's start or end date (depending on the university) + the college graduation credits earned time the number of weeks in a semester divided by the credits your course requires per month or year.
This date could very if the number of required credits differs depending on semesters (i.e.: first year: 15 credits per semester vs second year 12 credit) or if additional course requirements are not factored.