For in-state students, it only takes a week or two, especially if you meet all of the guaranteed admissions requirements. Can't help you with the out-of-state timetable.
Good luck. My daughter is a freshman there and loves it. My son is a high school junior who wants to go there when he graduates. Mom and Dad like in-state tuition, the good education, and the chance to see our kids more frequently than if they were out of state.