However, it is not necessarily super difficult at every campus, based on college GPAs:
- UCD: 3.0 GPA (CS or CSE). Changing Majors and Double Majors
- UCI: 2.7 (overall) and 3.0 (in prerequisites) GPA (CS or CSE). Donald Bren School of Information and Computer Sciences
- UCM: 2.0 GPA. Declaration of Major | Engineering Academic Advising
- UCR: 3.0 GPA. Major Changes | Engineering Student Affairs
- UCSC: 2.8 (BA) or 3.0 (BS) GPA. https://undergrad.soe.ucsc.edu/sites/default/files/file-content-type/2021-11/CS_maj_dec_chart_2021_22.pdf
On the other hand, UCB (EECS), UCLA, UCSB, and UCSD are all very difficult to change into CS or CSE after enrolling. UCB L&S CS currently needs a 3.3 (in prerequisites) GPA, but that may change based on various proposals to limit overcrowding.