How should I calculate my GPA?

Technically and mathematically your school is 100% correct in valuing an A- at 3.667 because if a B=3.000 and an A=4.000 then a B+=3.333 and the A-=3.667. What many UWGPA calculators do is round off the middle grades so they round up the A-=3.7 and round down the B+=3.3. What this does is give A students a boost in GPA by 0.033 and dings a B student by 0.033 which seems unfair to the poor B student struggling to get better grades.

Your school seems to plays it fairly down the middle not giving anybody a loophole or GPA advantage.

For purposes of using the CollegeVine chancing profile, I would use the 3.7 for A- and the 3.3 for B+ and other conventions like 2.7 for B- and 2.3 for C+ just to be consistent with how they are evaluating all CollegeVine subscribers.

When you get your final Transcript from your high school, the college you apply is going to see whatever UWGPA and WGPA your school puts down on the digital record so you can't fudge that. So if your transcript says your UWGPA is 3.717 at your school but you know they haircut it by 0.033 then you can explain the UWGPA in the additional information section of the Common App and just let the admissions officer know that by normally accepted GPA conventions your UWGPA is 3.75, not 3.717. I'm not sure that makes much of a difference but you never know. If your UWGPA is say under 3.5, I wouldn't botter explaining anything because your HS gives a better value for B students.

Hope that helps.

This is an interesting question! In comparison, an A- at my school is a 3.75. I would ask your guidance counselor first before recalculating anything. If that doesn't work out, then yes, I would absolutely use the high school GPA calculator website and calculate your GPA that way and put it on your chancing profile. I've never heard of such a thing, so I think your question may induce a lot of uncertainty and confusion.

Try this GPA calculator site : https://www.easyunitconverter.com/gpa-calculator