Grade calculator for a 15-question test
On a 15-question test, each question is worth 6.67% and you can miss 1 for an A, 3 for a B, 4 for a C and 6 for a D (common 90/80/70/60 scale). One wrong answer is 93.3%.
15-question test grade chart
Score for every number of wrong answers, rounded to one decimal.
| Wrong | Right | Score | Letter |
|---|---|---|---|
| 0 | 15 | 100.0% | A |
| 1 | 14 | 93.3% | A |
| 2 | 13 | 86.7% | B |
| 3 | 12 | 80.0% | B |
| 4 | 11 | 73.3% | C |
| 5 | 10 | 66.7% | D |
| 6 | 9 | 60.0% | D |
| 7 | 8 | 53.3% | F |
| 8 | 7 | 46.7% | F |
| 9 | 6 | 40.0% | F |
| 10 | 5 | 33.3% | F |
| 11 | 4 | 26.7% | F |
| 12 | 3 | 20.0% | F |
| 13 | 2 | 13.3% | F |
| 14 | 1 | 6.7% | F |
| 15 | 0 | 0.0% | F |
The math: score = right answers ÷ 15 × 100. Each question is 100 ÷ 15 = 6.67 percentage points, so every wrong answer takes 6.67 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.