How many semester units in a Ph.D?

There's no single answer to how many semester units are in a Ph.D. The number varies greatly depending on the university, the specific program, and even the student's individual course of study. While some programs might have a minimum unit requirement, many Ph.D. programs focus on research and dissertation completion rather than a fixed number of course units. A typical range might be anywhere from 0 to 60 semester units or more, but the dissertation itself is usually not counted in terms of units. The emphasis is on the research and comprehensive exams, not a prescribed number of class credits.