The number of credits typically required for a four-year bachelor's degree is about 120. A student needs approximately 60 credits for a two-year associate degree.
The exact number of credits needed varies somewhat among different majors and institutions. For instance, at Stony Brook University, a student must have 120 credits to earn a Bachelor of Science or Bachelor of Arts degree. However, the engineering department requires 128 credits for an undergraduate degree.
Some institutions, like the University of Washington, operate on the quarter rather than semester system. In this case, 180 quarter credits are standard. In either system, each college or university sets its own distribution of credits among general education, major, minor and elective classes.