What Grade Is 30 out of 40?
30 out of 40 is 75% — a C on the standard US scale, a satisfactory score.
- Percentage75%
- Letter gradeC
- Missed10 pts
- For an A (90%)36/40
Score breakdown for a 40-point test
| Score | Percent | Letter |
|---|---|---|
| 36/40 | 90% | A- |
| 32/40 | 80% | B- |
| 28/40 | 70% | C- |
| 30/40 | 75% | C |
How this is calculated
Divide the points earned by the points possible and multiply by 100: 30 ÷ 40 × 100 = 75%. On the common 10-point-band scale that lands in the C range — you'd have needed 36/40 to reach the A band.
Common questions
Is a 3.5 GPA good?
On the standard 4.0 scale, 3.5 sits between an A- and B+ average — comfortably above the typical US college average (around 3.1) and competitive for most graduate programs, internships and scholarships, though the most selective programs skew 3.7+. Trend matters too: an upward trajectory reads better than a flat one.
Why does my school's GPA differ from this one?
Schools differ on three things: whether A+ counts as 4.3 or 4.0, whether plus/minus grades are used at all, and whether honors/AP courses are weighted above 4.0. This calculator uses the most common unweighted convention (A+ = 4.0, minus/plus in 0.3 steps). Your registrar's number is the official one.