How do colleges calculate your GPA?

Its not that hard to see a 92 is a B+ or an 88 is an A, and review the transcript accordingly.

OP’s noted Wharton and business schools at Northwestern, NYU, Chicago, and Berkeley. They’re going to know his scale. With numerical scores, it’s hard not to view them in their range. If 90-100 is defined as excellent, a 90 would be low in that range. Better for those schools would be a higher number grades.

And for those, OP should be learning what years they look at and what else matters, what they say. Not just asking us.