What Grade Is 25 out of 30?
25 out of 30 is 83.33% — a B on the standard US scale, a good score.
- Percentage83.33%
- Letter gradeB
- Missed5 pts
- For an A (90%)27/30
Score breakdown for a 30-point test
| Score | Percent | Letter |
|---|---|---|
| 27/30 | 90% | A- |
| 24/30 | 80% | B- |
| 21/30 | 70% | C- |
| 25/30 | 83.33% | B |
How this is calculated
Divide the points earned by the points possible and multiply by 100: 25 ÷ 30 × 100 = 83.33%. On the common 10-point-band scale that lands in the B range — you'd have needed 27/30 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.
What's the difference between weighted and unweighted averages?
An unweighted average treats every score equally: add them up, divide by the count. A weighted average multiplies each category by its share of the grade first — homework 20%, midterms 40%, final 40% — which is how most courses actually work. If your syllabus lists category percentages, you need the weighted version.