Calculate your GPA for UC frosh admission purposes here: https://rogerhub.com/gpa-calculator-uc/ (use the weighted-capped version to compare with most UC web sites)
https://www.universityofcalifornia.edu/infocenter/freshman-admissions-summary can help you with chances (select Freshman Admit Rate and HS GPA). However, expect admission to be more difficult if you want a popular major like computer science or an engineering major.