I've seen so many different things online. Our school's grading is like this A+ 99-100 A 95-98 A- 93-94 B+ 91-92 B 87-90 B- 85-86 C+ 83-85 C 79-82 etc.... so, how do I calculate my GPA? I don't know any scale or anything but I'm a sophomore and am starting to look at college books with average gpa's etc. so i need to figure out how to calculate it. Also, anyone have any wise words on how to motivate myself to get better grades, I definitely need better ones.