What Grade Is 15 out of 30? (15/30)
15 out of 30 (15/30) is 50%: an F on all three common scales. That is 15 wrong answers and 0.0 GPA points on the 4.0 scale.
- Percentage
- 50%
- 15 / 30 x 100
- 10 point letter
- F
- F with +/-, F on 7 point
- Wrong
- 15
- of 30 questions
- 4.0 GPA
- 0.0
- for an F
One more right, one fewer: 16/30 and 14/30
One more right makes it 16 out of 30, a 53.33%: still an F on the 10 point scale. One fewer is 14 out of 30, a 46.67%, the same F. Each question is worth 3.33 percentage points.
The next letter up with pluses and minuses is a D- at 18/30 (60%), 3 more right answers away. That is also a D on the 10 point scale.
Right answers needed for each letter out of 30
| Letter | Percent | Right | From 15/30 |
|---|---|---|---|
| A | 93 to 100 | 28 or more | 13 more right |
| A- | 90 to under 93 | 27 or more | 12 more right |
| B | 83 to under 87 | 25 or more | 10 more right |
| B- | 80 to under 83 | 24 or more | 9 more right |
| C | 73 to under 77 | 22 or more | 7 more right |
| C- | 70 to under 73 | 21 or more | 6 more right |
| D | 63 to under 67 | 19 or more | 4 more right |
| D- | 60 to under 63 | 18 or more | 3 more right |
| F | below 60 | 17 or fewer | your score |
Plus and minus scale; the 10 point letter is the plain letter. B+, C+ and D+ cannot happen with whole scores out of 30.
50% on other test lengths
15/30 is exactly the same grade as 5 out of 10, 6 out of 12, 10 out of 20, 20 out of 40, 25 out of 50 and 30 out of 60: 50%, an F.
Is 15 out of 30 passing?
Not where passing starts at 60%: that takes 18 right out of 30, and 15/30 is 3 questions short. Where the line is 70%, as on the 7 point scale, it needs 21 right, 6 more right answers. Whether a D passes the class is a separate rule, covered in the passing grade guide.
Out of 30 grade chart with 15/30 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 15 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.
15/30 as a percent: worked example
You get 15 right on a 30 question test. What is the percent and the letter?
- 15 / 30 = 0.5 (1/2 in lowest terms)
- 0.5 x 100 = 50%
- 50 is an F on all three scales (below 60 with pluses and minuses)
15/30 is 50%: an F on all three common scales.
Questions and answers
Is a 15 out of 30 a good grade?
50% is a failing score on the 10 point scale (an F). An A takes 27 right, 12 more right answers than 15. It does not pass on the common scales.
What do I need for the next letter after 15/30?
18 right out of 30 (60%) is a D- with pluses and minuses, 3 more questions than 15. That is also a D on the 10 point scale.
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