Score lookup
21 out of 21 as a percentage is 100% (A)
A 21/21 is 100%, which is an A on the standard grading scale (an A+ with plus and minus grades). That is a 4.0 GPA, and you got 0 wrong.
- Percentage
- 100%
- Letter grade
- Astandard A–F
- Plus and minus
- A+4.0 GPA
- 7-point scale
- A4.0 GPA
- GPA
- 4.0on a 4.0 scale
Next gradeTop gradeNothing above it on this scale
With a 5-point curve100% → Aif your teacher adds 5 points
To pass (60%)Passed13 out of 21 is the passing line
What a 21/21 grade means
- 21 correct and 0 wrong on a 21-question test.
- Each question is worth 4.76%, so every wrong answer costs 4.76 percentage points.
- Any score from 19 to 21 out of 21 is an A.
- A perfect score: nothing above it.
- It passes a 60% passing score, which needs 13 out of 21.
How to work it out
- Divide the score by the total: 21 ÷ 21 = 1.
- Multiply by 100: 1 × 100 = 100%.
- Find 100% on the grading scale: A is 90% and up, B 80%, C 70% and D 60%, so it is an A.
21/21 on three grading scales
| Scale | Cutoffs | Letter | GPA |
|---|---|---|---|
| Standard A–F | A 90, B 80, C 70, D 60 | A | 4.0 |
| Plus and minus | A 93, A− 90, B+ 87, B 83, B− 80 … | A+ | 4.0 |
| 7-point | A 93, B 85, C 77, D 70 | A | 4.0 |
Which scale applies depends on your school or teacher; the syllabus usually says. The grading scales guide compares them.
Grade chart for a 21-question test
Every possible score out of 21, with 21 highlighted. Pick any score to see its page.
The same 100% on other tests
Questions about 21 out of 21
Is 21 out of 21 a good grade?
Yes. It is an A, the top grade on the standard US scale.
What GPA is 21 out of 21?
4.0 on a 4.0 scale as an A, or 4.0 if your school uses plus and minus grades (A+).
How many can you get wrong on a 21-question test and still pass?
8 at most with a 60% passing score: you need 13 out of 21. With a 70% passing score you need 15 out of 21.