Grade calculator for a 42-question test
On a 42-question test, each question is worth 2.38% and you can miss 4 for an A, 8 for a B, 12 for a C and 16 for a D (common 90/80/70/60 scale). One wrong answer is 97.6%.
42-question test grade chart
Score for every number of wrong answers, rounded to one decimal.
| Wrong | Right | Score | Letter |
|---|---|---|---|
| 0 | 42 | 100.0% | A |
| 1 | 41 | 97.6% | A |
| 2 | 40 | 95.2% | A |
| 3 | 39 | 92.9% | A |
| 4 | 38 | 90.5% | A |
| 5 | 37 | 88.1% | B |
| 6 | 36 | 85.7% | B |
| 7 | 35 | 83.3% | B |
| 8 | 34 | 81.0% | B |
| 9 | 33 | 78.6% | C |
| 10 | 32 | 76.2% | C |
| 11 | 31 | 73.8% | C |
| 12 | 30 | 71.4% | C |
| 13 | 29 | 69.0% | D |
| 14 | 28 | 66.7% | D |
| 15 | 27 | 64.3% | D |
| 16 | 26 | 61.9% | D |
| 17 | 25 | 59.5% | F |
| 18 | 24 | 57.1% | F |
| 19 | 23 | 54.8% | F |
| 20 | 22 | 52.4% | F |
| 21 | 21 | 50.0% | F |
| 22 | 20 | 47.6% | F |
| 23 | 19 | 45.2% | F |
| 24 | 18 | 42.9% | F |
| 25 | 17 | 40.5% | F |
| 26 | 16 | 38.1% | F |
| 27 | 15 | 35.7% | F |
| 28 | 14 | 33.3% | F |
| 29 | 13 | 31.0% | F |
| 30 | 12 | 28.6% | F |
| 31 | 11 | 26.2% | F |
| 32 | 10 | 23.8% | F |
| 33 | 9 | 21.4% | F |
| 34 | 8 | 19.0% | F |
| 35 | 7 | 16.7% | F |
| 36 | 6 | 14.3% | F |
| 37 | 5 | 11.9% | F |
| 38 | 4 | 9.5% | F |
| 39 | 3 | 7.1% | F |
| 40 | 2 | 4.8% | F |
| 41 | 1 | 2.4% | F |
| 42 | 0 | 0.0% | F |
The math: score = right answers ÷ 42 × 100. Each question is 100 ÷ 42 = 2.38 percentage points, so every wrong answer takes 2.38 points off a perfect 100%. Letters use the common 90/80/70/60 scale with no rounding up; your teacher may use different cutoffs, plus and minus grades or a curve, so check your school’s grading policy.