What Grade Is 18 out of 20? (18/20)
18 out of 20 (18/20) is 90%: an A on the 10 point scale, an A- with pluses and minuses and a B on the 7 point scale. That is 2 wrong answers and 3.7 GPA points on the 4.0 scale.
- Percentage
- 90%
- 18 / 20 x 100
- 10 point letter
- A
- A- with +/-, B on 7 point
- Wrong
- 2
- of 20 questions
- 4.0 GPA
- 3.7
- for an A-
One more right, one fewer: 19/20 and 17/20
One more right makes it 19 out of 20, a 95%: still an A on the 10 point scale. One fewer is 17 out of 20, an 85%, a B. Each question is worth 5 percentage points.
The next letter up with pluses and minuses is an A at 19/20 (95%), 1 more right answer away. On the 10 point scale 18/20 is already an A, so only the plus and minus scale has a step left.
Right answers needed for each letter out of 20
| Letter | Percent | Right | From 18/20 |
|---|---|---|---|
| A | 93 to 100 | 19 or more | 1 more right |
| A- | 90 to under 93 | 18 or more | your score |
| B | 83 to under 87 | 17 or more | 1 fewer |
| B- | 80 to under 83 | 16 or more | 2 fewer |
| C | 73 to under 77 | 15 or more | 3 fewer |
| C- | 70 to under 73 | 14 or more | 4 fewer |
| D | 63 to under 67 | 13 or more | 5 fewer |
| D- | 60 to under 63 | 12 or more | 6 fewer |
| F | below 60 | 11 or fewer | 7 fewer |
Plus and minus scale; the 10 point letter is the plain letter. B+, C+ and D+ cannot happen with whole scores out of 20.
90% on other test lengths
18/20 is exactly the same grade as 9 out of 10, 27 out of 30, 36 out of 40, 45 out of 50 and 54 out of 60: 90%, an A.
Is 18 out of 20 passing?
Yes. Where passing starts at 60%, which is 12 right out of 20, 18/20 clears it by 6 questions. It also passes where the line is 70% (14 right), as on the 7 point scale. Whether a D passes the class is a separate rule, covered in the passing grade guide.
Out of 20 grade chart with 18/20 marked
| Score | Percent | 10 pt | +/- | 7 pt |
|---|---|---|---|---|
| 20/20 | 100% | A | A | A |
| 19/20 | 95% | A | A | A |
| 18/20 | 90% | A | A- | B |
| 17/20 | 85% | B | B | B |
| 16/20 | 80% | B | B- | C |
| 15/20 | 75% | C | C | C |
| 14/20 | 70% | C | C- | D |
| 13/20 | 65% | D | D | F |
| 12/20 | 60% | D | D- | F |
| 11/20 | 55% | F | F | F |
| 10/20 | 50% | F | F | F |
| 9/20 | 45% | F | F | F |
| 8/20 | 40% | F | F | F |
| 7/20 | 35% | F | F | F |
| 6/20 | 30% | F | F | F |
| 5/20 | 25% | F | F | F |
| 4/20 | 20% | F | F | F |
| 3/20 | 15% | F | F | F |
| 2/20 | 10% | F | F | F |
| 1/20 | 5% | F | F | F |
| 0/20 | 0% | F | F | F |
Whole scores; the printable out of 20 chart adds a lookup and a CSV download.
How to calculate 18 out of 20 as a percentage
Divide the number right by the number of questions, multiply by 100, then find the band on your school's scale. CurveFox reads the letter from the exact percent, the same rule as the grading scale chart.
Next step: put this test into your class grade with the grade calculator, see what the final needs with the final grade calculator, or curve a whole class with the grade curve calculator.
18/20 as a percent: worked example
You get 18 right on a 20 question test. What is the percent and the letter?
- 18 / 20 = 0.9 (9/10 in lowest terms)
- 0.9 x 100 = 90%
- 90 is in 90 to 100 on the 10 point scale (A), 90 to under 93 with pluses and minuses (A-) and 85 to under 93 on the 7 point scale (B)
18/20 is 90%: an A on the 10 point scale, an A- with pluses and minuses and a B on the 7 point scale.
Questions and answers
Is an 18 out of 20 a good grade?
90% is an excellent score on the 10 point scale (an A). It is already an A; 19 right makes it an A with pluses and minuses too. It passes on every common scale.
What do I need for the next letter after 18/20?
19 right out of 20 (95%) is an A with pluses and minuses, 1 more question than 18. On the 10 point scale it is already an A.
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