How many hours of school are needed for a bachelors degree in psychology?

There's no single answer to how many hours of school are needed for a bachelor's degree in psychology. The number of credit hours required varies by university and program. However, a typical bachelor's degree in the United States requires between 120 and 130 semester credit hours. Each semester credit hour generally represents about 1 hour of class time per week for a 15-week semester. So while the total number of hours *in class* might be around 120-130, the total hours of study, including homework, reading, and studying for exams would be significantly more.