Grade calculator for a 31-question test
On a 31-question test, each question is worth 3.23% and you can miss 3 for an A, 6 for a B, 9 for a C and 12 for a D (common 90/80/70/60 scale). One wrong answer is 96.8%.
31-question test grade chart
Score for every number of wrong answers, rounded to one decimal.
| Wrong | Right | Score | Letter |
|---|---|---|---|
| 0 | 31 | 100.0% | A |
| 1 | 30 | 96.8% | A |
| 2 | 29 | 93.5% | A |
| 3 | 28 | 90.3% | A |
| 4 | 27 | 87.1% | B |
| 5 | 26 | 83.9% | B |
| 6 | 25 | 80.6% | B |
| 7 | 24 | 77.4% | C |
| 8 | 23 | 74.2% | C |
| 9 | 22 | 71.0% | C |
| 10 | 21 | 67.7% | D |
| 11 | 20 | 64.5% | D |
| 12 | 19 | 61.3% | D |
| 13 | 18 | 58.1% | F |
| 14 | 17 | 54.8% | F |
| 15 | 16 | 51.6% | F |
| 16 | 15 | 48.4% | F |
| 17 | 14 | 45.2% | F |
| 18 | 13 | 41.9% | F |
| 19 | 12 | 38.7% | F |
| 20 | 11 | 35.5% | F |
| 21 | 10 | 32.3% | F |
| 22 | 9 | 29.0% | F |
| 23 | 8 | 25.8% | F |
| 24 | 7 | 22.6% | F |
| 25 | 6 | 19.4% | F |
| 26 | 5 | 16.1% | F |
| 27 | 4 | 12.9% | F |
| 28 | 3 | 9.7% | F |
| 29 | 2 | 6.5% | F |
| 30 | 1 | 3.2% | F |
| 31 | 0 | 0.0% | F |
The math: score = right answers ÷ 31 × 100. Each question is 100 ÷ 31 = 3.23 percentage points, so every wrong answer takes 3.23 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.