Grade calculator for a 45-question test
On a 45-question test, each question is worth 2.22% and you can miss 4 for an A, 9 for a B, 13 for a C and 18 for a D (common 90/80/70/60 scale). One wrong answer is 97.8%.
45-question test grade chart
Score for every number of wrong answers, rounded to one decimal.
| Wrong | Right | Score | Letter |
|---|---|---|---|
| 0 | 45 | 100.0% | A |
| 1 | 44 | 97.8% | A |
| 2 | 43 | 95.6% | A |
| 3 | 42 | 93.3% | A |
| 4 | 41 | 91.1% | A |
| 5 | 40 | 88.9% | B |
| 6 | 39 | 86.7% | B |
| 7 | 38 | 84.4% | B |
| 8 | 37 | 82.2% | B |
| 9 | 36 | 80.0% | B |
| 10 | 35 | 77.8% | C |
| 11 | 34 | 75.6% | C |
| 12 | 33 | 73.3% | C |
| 13 | 32 | 71.1% | C |
| 14 | 31 | 68.9% | D |
| 15 | 30 | 66.7% | D |
| 16 | 29 | 64.4% | D |
| 17 | 28 | 62.2% | D |
| 18 | 27 | 60.0% | D |
| 19 | 26 | 57.8% | F |
| 20 | 25 | 55.6% | F |
| 21 | 24 | 53.3% | F |
| 22 | 23 | 51.1% | F |
| 23 | 22 | 48.9% | F |
| 24 | 21 | 46.7% | F |
| 25 | 20 | 44.4% | F |
| 26 | 19 | 42.2% | F |
| 27 | 18 | 40.0% | F |
| 28 | 17 | 37.8% | F |
| 29 | 16 | 35.6% | F |
| 30 | 15 | 33.3% | F |
| 31 | 14 | 31.1% | F |
| 32 | 13 | 28.9% | F |
| 33 | 12 | 26.7% | F |
| 34 | 11 | 24.4% | F |
| 35 | 10 | 22.2% | F |
| 36 | 9 | 20.0% | F |
| 37 | 8 | 17.8% | F |
| 38 | 7 | 15.6% | F |
| 39 | 6 | 13.3% | F |
| 40 | 5 | 11.1% | F |
| 41 | 4 | 8.9% | F |
| 42 | 3 | 6.7% | F |
| 43 | 2 | 4.4% | F |
| 44 | 1 | 2.2% | F |
| 45 | 0 | 0.0% | F |
The math: score = right answers ÷ 45 × 100. Each question is 100 ÷ 45 = 2.22 percentage points, so every wrong answer takes 2.22 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.