Each question on a 25-question test is worth 4%. On the 10-point scale the lowest A is 23/25 (92%), the lowest B is 20/25, the lowest C is 18/25 and the lowest D is 15/25. 14 right or fewer is an F.
25-question grading chart
| Right | Wrong | Percent | Grade | Plus/minus |
|---|---|---|---|---|
| 25 | 0 | 100% | A | A |
| 24 | 1 | 96% | A | A |
| 23 | 2 | 92% | A | A− |
| 22 | 3 | 88% | B | B+ |
| 21 | 4 | 84% | B | B |
| 20 | 5 | 80% | B | B− |
| 19 | 6 | 76% | C | C |
| 18 | 7 | 72% | C | C− |
| 17 | 8 | 68% | D | D+ |
| 16 | 9 | 64% | D | D |
| 15 | 10 | 60% | D | D− |
| 14 | 11 | 56% | F | F |
| 13 | 12 | 52% | F | F |
| 12 | 13 | 48% | F | F |
| 11 | 14 | 44% | F | F |
| 10 | 15 | 40% | F | F |
| 9 | 16 | 36% | F | F |
| 8 | 17 | 32% | F | F |
| 7 | 18 | 28% | F | F |
| 6 | 19 | 24% | F | F |
| 5 | 20 | 20% | F | F |
| 4 | 21 | 16% | F | F |
| 3 | 22 | 12% | F | F |
| 2 | 23 | 8% | F | F |
| 1 | 24 | 4% | F | F |
| 0 | 25 | 0% | F | F |
Grades use the 10-point scale (A 90–100, B 80–89, C 70–79, D 60–69, F below 60) on the percentage rounded to a whole number. Every score on this test comes out to a whole percentage, so rounding never changes a grade. The plus/minus column splits each band in thirds, such as B− 80–82, B 83–86 and B+ 87–89: a common split, but schools differ. Your school’s policy has the last word.
Common scores out of 25
- 22/25 is 88%: a B (B+ with plus and minus). 1 more right would make it an A.
- 18/25 is 72%: a C (C− with plus and minus). 2 more right would make it a B.
- 17/25 is 68%: a D (D+ with plus and minus). 1 more right would make it a C.
- 20/25 is 80%: a B (B− with plus and minus). 3 more right would make it an A.
- 23/25 is 92%: an A (A− with plus and minus).
- 21/25 is 84%: a B. 2 more right would make it an A.
- 19/25 is 76%: a C. 1 more right would make it a B.
The same grade on other test lengths
The score that gives each percentage on the test lengths teachers use most. Where it’s a half score, such as 13.5/15, you need the next whole score (14/15) if you don’t give half points.
| Grade | 15 questions | 20 questions | 25 questions | 30 questions | 50 questions |
|---|---|---|---|---|---|
| 90% (A) | 13.5/15 | 18/20 | 22.5/25 | 27/30 | 45/50 |
| 80% (B) | 12/15 | 16/20 | 20/25 | 24/30 | 40/50 |
| 70% (C) | 10.5/15 | 14/20 | 17.5/25 | 21/30 | 35/50 |
| 60% (D) | 9/15 | 12/20 | 15/25 | 18/30 | 30/50 |
For any other length, use the teacher grade calculator.
Questions
Is 15 out of 25 passing?
15/25 is 60%, a D on the 10-point scale. A D is the lowest passing grade there: Florida’s law calls it “lowest acceptable progress” and anything under 60% a failure. Your course may set a higher pass mark, so check the syllabus.
What is 80% of 25 questions?
20 right. 20/25 is the lowest B on the 10-point scale.
How many can you miss and still get an A?
2 questions. 23/25 is 92%; one more wrong answer gives 88%, a B.
Sources
- Florida Statutes §1003.437, Middle and high school grading system: A 90–100%, B 80–89%, C 70–79%, D 60–69% (“lowest acceptable progress”), F 0–59%.
- College Board BigFuture, How to Calculate Your GPA on a 4.0 Scale: a commonly used chart with A 90–100, B 80–89 and C 70–79; it notes that schools use different cutoffs.