Is 3.7 A or A+?
A 3.7 GPA is usually an A-, not an A+. An A is usually 4.0, and an A+ is usually 4.0 or sometimes 4.3 depending on the school.
Standard plus/minus scale
A common scale is A+ = 4.0, A = 4.0, A- = 3.7, B+ = 3.3. Some colleges make A+ = 4.3, but A- is still usually 3.7.
So 3.7 is best described as A-minus or A-range.
Is 3.7 still strong?
Yes. A 3.7 is strong even though it is not A+. It reflects mostly A-level work.
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