or B.S.) Double majors must fulfill all of the requirements for both majors with no overlapping courses. While students usually only declare one major, it is also possible to declare multiple majors within the same bachelor degree program (BA, BS, or BAS). Stanford supports a wide range of opportunities to pursue more than one advanced degree, both within the School of Medicine and throughout other schools across the university. You may do this either at the time of initial Major declaration, or by adding another major at a later date. The difference between a Double Major and Secondary Major is the ability to duplicate courses. It allows you to either deepen or diversify their course of study. Double majors must fulfill all of the requirements for both majors with no overlapping courses. Double Majors and Secondary Majors; Explore Majors . Farm Legend: Double Majors Require 225 Units There’s a myth going around that to do a double major, you have to do 225 units to graduate.