What Grade Is 20 out of 30? (20/30)
20 out of 30 (20/30) is 66.67%, which rounds to 67%: a D on the 10 point and plus and minus scales and an F on the 7 point scale. That is 10 wrong answers and 1.0 GPA points on the 4.0 scale. A gradebook that rounds to 67% first would make it a D+ on the plus and minus scale.
- Percentage
- 66.67%
- rounds to 67%
- 10 point letter
- D
- D with +/-, F on 7 point
- Wrong
- 10
- of 30 questions
- 4.0 GPA
- 1.0
- for a D
One more right, one fewer: 21/30 and 19/30
One more right makes it 21 out of 30, a 70%: a C on the 10 point scale and a C- with pluses and minuses. One fewer is 19 out of 30, a 63.33%, the same D. Each question is worth 3.33 percentage points.
The next letter up with pluses and minuses is a C- at 21/30 (70%), 1 more right answer away. That is also a C on the 10 point scale.
Right answers needed for each letter out of 30
| Letter | Percent | Right | From 20/30 |
|---|---|---|---|
| A | 93 to 100 | 28 or more | 8 more right |
| A- | 90 to under 93 | 27 or more | 7 more right |
| B | 83 to under 87 | 25 or more | 5 more right |
| B- | 80 to under 83 | 24 or more | 4 more right |
| C | 73 to under 77 | 22 or more | 2 more right |
| C- | 70 to under 73 | 21 or more | 1 more right |
| D | 63 to under 67 | 19 or more | your score |
| D- | 60 to under 63 | 18 or more | 2 fewer |
| F | below 60 | 17 or fewer | 3 fewer |
Plus and minus scale; the 10 point letter is the plain letter. B+, C+ and D+ cannot happen with whole scores out of 30.
66.67% on other test lengths
20/30 is exactly the same grade as 8 out of 12, 10 out of 15 and 40 out of 60: 66.67%, a D.
Is 20 out of 30 passing?
Yes. Where passing starts at 60%, which is 18 right out of 30, 20/30 clears it by 2 questions. Where the line is 70%, as on the 7 point scale, it needs 21 right, 1 more right answer. Whether a D passes the class is a separate rule, covered in the passing grade guide.
Out of 30 grade chart with 20/30 marked
| Score | Percent | 10 pt | +/- | 7 pt |
|---|---|---|---|---|
| 30/30 | 100% | A | A | A |
| 29/30 | 96.67% | A | A | A |
| 28/30 | 93.33% | A | A | A |
| 27/30 | 90% | A | A- | B |
| 26/30 | 86.67% | B | B | B |
| 25/30 | 83.33% | B | B | C |
| 24/30 | 80% | B | B- | C |
| 23/30 | 76.67% | C | C | C |
| 22/30 | 73.33% | C | C | D |
| 21/30 | 70% | C | C- | D |
| 20/30 | 66.67% | D | D | F |
| 19/30 | 63.33% | D | D | F |
| 18/30 | 60% | D | D- | F |
| 17/30 | 56.67% | F | F | F |
| 16/30 | 53.33% | F | F | F |
| 15/30 | 50% | F | F | F |
| 14/30 | 46.67% | F | F | F |
| 13/30 | 43.33% | F | F | F |
| 12/30 | 40% | F | F | F |
| 11/30 | 36.67% | F | F | F |
| 10/30 | 33.33% | F | F | F |
| 9/30 | 30% | F | F | F |
| 8/30 | 26.67% | F | F | F |
| 7/30 | 23.33% | F | F | F |
| 6/30 | 20% | F | F | F |
| 5/30 | 16.67% | F | F | F |
| 4/30 | 13.33% | F | F | F |
| 3/30 | 10% | F | F | F |
| 2/30 | 6.67% | F | F | F |
| 1/30 | 3.33% | F | F | F |
| 0/30 | 0% | F | F | F |
Whole scores; the printable out of 30 chart adds a lookup and a CSV download.
How to calculate 20 out of 30 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.
20/30 as a percent: worked example
You get 20 right on a 30 question test. What is the percent and the letter?
- 20 / 30 = 0.6667 (2/3 in lowest terms)
- 0.6667 x 100 = 66.67%, 67% rounded to a whole percent
- 66.67 is in 60 to under 70 on the 10 point scale (D), 63 to under 67 with pluses and minuses (D) and below 70 on the 7 point scale (F)
20/30 is 66.67%: a D on the 10 point and plus and minus scales and an F on the 7 point scale.
Questions and answers
Is a 20 out of 30 a good grade?
66.67% is a weak pass on the 10 point scale (a D). An A takes 27 right, 7 more right answers than 20. It passes where the line is 60% but not where it is 70%.
What do I need for the next letter after 20/30?
21 right out of 30 (70%) is a C- with pluses and minuses, 1 more question than 20. That is also a C on the 10 point scale.
Does 20/30 round up to a higher letter?
Only if your teacher rounds first. 66.67% rounds to 67%, which would give a D+ instead of a D on the plus and minus scale. Read from the exact percent, the letter stays as shown; your syllabus says which rule applies.
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