40 Question Test Grade Calculator
Find your percentage and letter grade on a 40-question test from the number of questions you got wrong.
I know the number of
Your score
—
Edit grade boundaries
The lowest percentage for each grade. Everything below the last one is the lowest grade.
Grades for every result
| Wrong | Correct | Score | Grade |
|---|
How much is each question worth?
On a 40-question test every question is worth 100 ÷ 40 = 2.5%. Each wrong answer lowers your score by 2.5 percentage points.
40 question test grading scale
| Wrong | Correct | Score | Grade |
|---|---|---|---|
| 0 | 40 | 100% | A+ |
| 1 | 39 | 97.5% | A+ |
| 2 | 38 | 95% | A |
| 3 | 37 | 92.5% | A− |
| 4 | 36 | 90% | A− |
| 5 | 35 | 87.5% | B+ |
| 6 | 34 | 85% | B |
| 7 | 33 | 82.5% | B− |
| 8 | 32 | 80% | B− |
| 9 | 31 | 77.5% | C+ |
| 10 | 30 | 75% | C |
| 11 | 29 | 72.5% | C− |
| 12 | 28 | 70% | C− |
| 13 | 27 | 67.5% | D+ |
| 14 | 26 | 65% | D |
| 15 | 25 | 62.5% | D− |
| 16 | 24 | 60% | D− |
| 17 | 23 | 57.5% | F |
| 18 | 22 | 55% | F |
| 19 | 21 | 52.5% | F |
| 20 | 20 | 50% | F |
| 40 | 0 | 0% | F |
Grades use the standard US scale (A+ from 97%, F below 60%). Rows below 50% are left out — the calculator shows them all.
How many can you miss?
- A− or better (90%): up to 4 wrong
- B− or better (80%): up to 8 wrong
- C− or better (70%): up to 12 wrong
- D− or better (60%): up to 16 wrong
Frequently asked questions
How many questions can you miss on a 40-question test to pass?
With 60% as the passing mark you can miss up to 16 questions and still pass with a D−. If your course needs 70%, you can miss up to 12.
What is 1 wrong on a 40-question test?
39 out of 40 is 97.5% — a grade of A+ on the standard scale.
How many can I get wrong to get an A on a 40-question test?
For an A− (90%) you can miss up to 4; for a solid A (93%) up to 2.