Is a 90 a 3.7 GPA?
Every score from 85 to 100, under both scales
| Score | Plus/minus scale | Straight-letter scale (A = 90+) |
|---|---|---|
| 100 | A+ → 4.0 | A → 4.0 |
| 97 | A+ → 4.0 | A → 4.0 |
| 95 | A → 4.0 | A → 4.0 |
| 93 | A → 4.0 | A → 4.0 |
| 92 | A− → 3.7 | A → 4.0 |
| 90 | A− → 3.7 | A → 4.0 |
| 89 | B+ → 3.3 | B → 3.0 |
| 87 | B+ → 3.3 | B → 3.0 |
| 85 | B → 3.0 | B → 3.0 |
Note the reversal at 89: plus/minus grading helps you there (3.3 vs 3.0) even though it hurt you at 90–92. Neither scale is uniformly kinder — it depends on where your scores land within each band.
What a 3.7 actually means
A 3.7 is a strong GPA by any external measure: it clears the common cutoffs for dean's list at many schools (often 3.5), keeps most merit scholarships (commonly 3.0–3.5), and sits within range of selective graduate programs. The gap between 3.7 and 4.0 matters mostly in two places: class rank at competitive high schools, where hundredths separate students, and the psychological pull of a "perfect" GPA. If your school gives an A− for your 90s, a transcript of straight 90s produces a 3.7 — excellent, and worth defending, but not the 4.0 the same scores would earn across town.
If you're hovering at 89–90
The 89-to-90 step is worth 0.4 grade points (B+ 3.3 → A− 3.7) on the plus/minus scale, and a full point (3.0 → 4.0) at straight-letter schools — the largest single-point payoffs anywhere on the chart. If a final exam remains, calculate exactly what you need: from an 89 with a 20% final, scoring about 5 points above your current average clears the 90 line without relying on rounding. That's usually a far better plan than hoping the instructor rounds 89.5 up.
Try it yourself: GPA Calculator
Enter your grades course by course and see your GPA computed on the 4.0 scale.
Frequently asked questions
Is a 90 average good enough for a 4.0 at any school?
Yes — at straight-letter schools where the A band is 90–100 with no minus grades, a 90 average earns a 4.0 if every course individually hits 90+. At plus/minus schools, 90s convert to 3.7s, and you'd need 93s (or 94s at some schools) across the board for the 4.0.
What letter grade is exactly 90.0?
At plus/minus schools, 90.0 is the first score in the A− band. At straight-letter schools it's the first A. It only fails to reach the A range at the minority of schools that start the A− above 90 — rare, but check your syllabus.
Is a 3.7 GPA good for college applications?
Yes. A 3.7 unweighted places you in range for the large majority of US colleges and competitive for many selective ones, especially with rigorous coursework. The difference between 3.7 and 4.0 matters less to admissions readers than the difficulty of the classes behind it.