Grade calculator for a 20-question test
On a 20-question test, each question is worth 5% and you can miss 2 for an A, 4 for a B, 6 for a C and 8 for a D (common 90/80/70/60 scale). One wrong answer is 95.0%.
20-question test grade chart
Score for every number of wrong answers, rounded to one decimal.
| Wrong | Right | Score | Letter |
|---|---|---|---|
| 0 | 20 | 100.0% | A |
| 1 | 19 | 95.0% | A |
| 2 | 18 | 90.0% | A |
| 3 | 17 | 85.0% | B |
| 4 | 16 | 80.0% | B |
| 5 | 15 | 75.0% | C |
| 6 | 14 | 70.0% | C |
| 7 | 13 | 65.0% | D |
| 8 | 12 | 60.0% | D |
| 9 | 11 | 55.0% | F |
| 10 | 10 | 50.0% | F |
| 11 | 9 | 45.0% | F |
| 12 | 8 | 40.0% | F |
| 13 | 7 | 35.0% | F |
| 14 | 6 | 30.0% | F |
| 15 | 5 | 25.0% | F |
| 16 | 4 | 20.0% | F |
| 17 | 3 | 15.0% | F |
| 18 | 2 | 10.0% | F |
| 19 | 1 | 5.0% | F |
| 20 | 0 | 0.0% | F |
The math: score = right answers ÷ 20 × 100. Each question is 100 ÷ 20 = 5 percentage points, so every wrong answer takes 5 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.