What Grade Is 40 out of 50?
40 out of 50 is 80% — a B- on the standard US scale, a good score.
- Percentage80%
- Letter gradeB-
- Missed10 pts
- For an A (90%)45/50
Score breakdown for a 50-point test
| Score | Percent | Letter |
|---|---|---|
| 45/50 | 90% | A- |
| 40/50 | 80% | B- |
| 35/50 | 70% | C- |
| 40/50 | 80% | B- |
How this is calculated
Divide the points earned by the points possible and multiply by 100: 40 ÷ 50 × 100 = 80%. On the common 10-point-band scale that lands in the B- range — you'd have needed 45/50 to reach the A band.
Common questions
How are letter grades calculated from percentages?
Most US schools map percentages to letters in 10-point bands: 90–100 is an A range, 80–89 a B range, 70–79 a C range, 60–69 a D range, and below 60 an F. Plus/minus splits each band roughly in thirds (e.g. 90–92 = A-, 93–96 = A, 97+ = A+). Individual schools and professors can and do vary the cutoffs.
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.