What Grade Is 28 out of 40?
28 out of 40 is 70% — a C- on the standard US scale, a satisfactory score.
- Percentage70%
- Letter gradeC-
- Missed12 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- |
| 28/40 | 70% | C- |
How this is calculated
Divide the points earned by the points possible and multiply by 100: 28 ÷ 40 × 100 = 70%. 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
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.
Is a 90 an A or an A-?
In plus/minus systems, 90–92 is typically an A- and 93+ is an A, which affects GPA (3.7 vs 4.0). In straight-letter systems, everything from 90 up is simply an A. This calculator shows the plus/minus convention because it's the most common — your syllabus decides which applies to you.