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30 out of 40 as a percentage is 75% (C)
A 30/40 is 75%, which is a C on the standard grading scale. That is a 2.0 GPA, and you got 10 wrong.
- Percentage
- 75%
- Letter grade
- Cstandard A–F
- Plus and minus
- C2.0 GPA
- 7-point scale
- D1.0 GPA
- GPA
- 2.0on a 4.0 scale
Next grade2 more → B32 out of 40 is 80%
With a 5-point curve80% → Bif your teacher adds 5 points
To pass (60%)Passed24 out of 40 is the passing line
What a 30/40 grade means
- 30 correct and 10 wrong on a 40-question test.
- Each question is worth 2.5%, so every wrong answer costs 2.5 percentage points.
- Any score from 28 to 31 out of 40 is a C.
- 2 more correct (32 out of 40, 80%) would make it a B.
- It passes a 60% passing score, which needs 24 out of 40.
How to work it out
- Divide the score by the total: 30 ÷ 40 = 0.75.
- Multiply by 100: 0.75 × 100 = 75%.
- Find 75% on the grading scale: A is 90% and up, B 80%, C 70% and D 60%, so it is a C.
30/40 on three grading scales
| Scale | Cutoffs | Letter | GPA |
|---|---|---|---|
| Standard A–F | A 90, B 80, C 70, D 60 | C | 2.0 |
| Plus and minus | A 93, A− 90, B+ 87, B 83, B− 80 … | C | 2.0 |
| 7-point | A 93, B 85, C 77, D 70 | D | 1.0 |
Which scale applies depends on your school or teacher; the syllabus usually says. The grading scales guide compares them.
Grade chart for a 40-question test
Every possible score out of 40, with 30 highlighted. Pick any score to see its page. The 40-question grade chart adds plus/minus grades, GPA and questions about this test length.
| Correct | Wrong | Percentage | Grade |
|---|---|---|---|
| 40 | 0 | 100% | A |
| 39 | 1 | 97.5% | A |
| 38 | 2 | 95% | A |
| 37 | 3 | 92.5% | A |
| 36 | 4 | 90% | A |
| 35 | 5 | 87.5% | B |
| 34 | 6 | 85% | B |
| 33 | 7 | 82.5% | B |
| 32 | 8 | 80% | B |
| 31 | 9 | 77.5% | C |
| 30 | 10 | 75% | C |
| 29 | 11 | 72.5% | C |
| 28 | 12 | 70% | C |
| 27 | 13 | 67.5% | D |
| 26 | 14 | 65% | D |
| 25 | 15 | 62.5% | D |
| 24 | 16 | 60% | D |
| 23 | 17 | 57.5% | F |
| 22 | 18 | 55% | F |
| 21 | 19 | 52.5% | F |
| 20 | 20 | 50% | F |
| 19 | 21 | 47.5% | F |
| 18 | 22 | 45% | F |
| 17 | 23 | 42.5% | F |
| 16 | 24 | 40% | F |
| 15 | 25 | 37.5% | F |
| 14 | 26 | 35% | F |
| 13 | 27 | 32.5% | F |
| 12 | 28 | 30% | F |
| 11 | 29 | 27.5% | F |
| 10 | 30 | 25% | F |
| 9 | 31 | 22.5% | F |
| 8 | 32 | 20% | F |
| 7 | 33 | 17.5% | F |
| 6 | 34 | 15% | F |
| 5 | 35 | 12.5% | F |
| 4 | 36 | 10% | F |
| 3 | 37 | 7.5% | F |
| 2 | 38 | 5% | F |
| 1 | 39 | 2.5% | F |
| 0 | 40 | 0% | F |
The same 75% on other tests
Questions about 30 out of 40
Is 30 out of 40 a good grade?
It is a C, an average grade and a pass at most US schools. On a stricter 7-point scale it would be a D.
What GPA is 30 out of 40?
2.0 on a 4.0 scale, as a C.
What about 30.5 out of 40?
With a half point, 30.5 out of 40 is 76.25%: a C on the standard scale and a C with plus and minus grades.
How many can you get wrong on a 40-question test and still pass?
16 at most with a 60% passing score: you need 24 out of 40. With a 70% passing score you need 28 out of 40.