* Type of degree: An associate's degree typically requires 60-64 units, while a bachelor's degree usually requires 120-128 units. Master's and doctoral degrees require considerably more.
* Institution: Different colleges and universities have different requirements. Some may have slightly more or fewer units required for the same degree.
* Major: Some majors are more unit-intensive than others; engineering or science majors often require more units than humanities majors.
There's no single answer. You must check the specific requirements of the institution and program you are considering.