13 Out of 28 Grade: Percentage, Letter Grade & GPA
13 out of 28 is 46.43%. That is an F (0.0 GPA) on the standard A–F scale and an F (0.0 GPA) on the plus-minus scale. It is below the usual passing mark of 60%, so it is not a passing grade at most schools.
Check Your Own Score
You need 16.8 out of 28 (60%) for the next grade (D).
Key Takeaways
- Percentage: 13/28 = 46.43%
- Letter grade: F (standard), F (plus-minus), F (7-point scale)
- GPA: 0.0 (standard), 0.0 (plus-minus)
- Passing: No
- Next grade needs: 16.8/28 (60%) for a D
What Does 13 Out of 28 Mean?
Getting 13 out of 28 means 13 correct answers and 15 wrong or missed ones. Each question on a 28-question test is worth 3.57%, so every mistake costs a small but real amount. 15 questions cost you 53.57% of the points. In simple words, you got 13 of 28 questions right, which is about 4.64 out of every 10.
The formula is correct answers ÷ total questions × 100:
13 ÷ 28 × 100 = 46.43%
| Score | Percentage | Standard | Plus-minus | GPA |
|---|---|---|---|---|
| 13/28 | 46.43% | F | F | 0.0 / 0.0 |
You earned 46.43% of the points and missed 53.57%. Schools use different scales, so check your syllabus.
13/28 as a Fraction, Decimal, Ratio, and Equal Scores
13/28 is already in its simplest form. As a decimal, it is 0.4643. As a ratio, it is 13:28, and as a percentage, it is 46.43%. It also equals 4.64 out of 10 and 9.29 out of 20. Scores with a different total can be compared by their percentage.
Is 13 Out of 28 a Good Grade?
46.43% is an F on both A–F scales. The good news is that one test rarely decides a final grade, and 17/28 would bring you back to a D (60%).
With 15 questions missed, the first goal is not an A. It is reaching 60%, and then 70%. Small, steady steps work better than trying to fix everything at once.
Grading Chart for a 28-Question Test
| Correct | Wrong | Percentage | Standard | Plus-minus |
|---|---|---|---|---|
| 17 | 11 | 60.71% | D | D |
| 16 | 12 | 57.14% | F | F |
| 15 | 13 | 53.57% | F | F |
| 14 | 14 | 50% | F | F |
| 13 | 15 | 46.43% | F | F |
| 12 | 16 | 42.86% | F | F |
| 11 | 17 | 39.29% | F | F |
| 10 | 18 | 35.71% | F | F |
| 9 | 19 | 32.14% | F | F |
Scores below 17 out of 28 are an F on both scales.
Minimum Score for Each Grade on a 28-Question Test
On the standard scale, a 28-question test needs at least 26 correct for an A, 23 for a B, 20 for a C, and 17 for a D.
| Grade | Cutoff | Points needed | Minimum correct | Your 13/28 |
|---|---|---|---|---|
| A | 90% | 25.2 | 26 | 12.2 short |
| B | 80% | 22.4 | 23 | 9.4 short |
| C | 70% | 19.6 | 20 | 6.6 short |
| D | 60% | 16.8 | 17 | 3.8 short |
How Is the Letter Grade for 13/28 Decided?
To find the letter grade, the percentage is compared with a grading scale. On the standard scale, below 60% is an F, so 46.43% is an F. On the plus-minus scale, below 60% is an F, so 46.43% is an F.
| Percentage | Standard | Plus-minus | GPA (standard) |
|---|---|---|---|
| 90–100% | A | A+, A, A− | 4.0 |
| 80–89% | B | B+, B, B− | 3.0 |
| 70–79% | C | C+, C, C− | 2.0 |
| 60–69% | D | D | 1.0 |
| Below 60% | F | F | 0.0 |
How to Use the Calculator Above
Start with the total (28) and your score (13). To enter a score with decimals, such as 12.75 or 13.33, tick Allow decimal points first. The calculator also shows how many points you need for the next grade, which is 16.8/28 (60%) for a D. Switch to the plus-minus scale to see how the letter changes. You can also check any other score with the free Easy Grader calculator.
When 13/28 May Not Match Your Final Grade
The calculator gives the grade for this one score. These six things can change how it counts toward your final grade:
Weighted Categories
A question-based test counts only as much as your teacher weights it. At a 10% weight, 46.43% adds about 4.64 of the 10 available points.
Extra Credit
13/28 plus 1 bonus point becomes 14/28 (50%). Some teachers allow totals above 100%.
Dropped Scores
Dropping the lowest grade is common in courses with many quizzes. A score like this may or may not count, depending on your class.
Curved Tests
If the test is curved, apply the curve first and then convert the new score to a percentage.
Rounding Rules
Rounding 46.43% to 46% keeps you in the same grade range on both scales, so rounding does not change this grade.
Pass/Fail Courses
In pass/fail courses, only your school’s cutoff matters, usually 60% or 70%, and a letter may not be shown.
If your recorded score ever looks wrong, remember that 13 ÷ 28 is always 46.43%, so ask your teacher to check it.
Real Examples With 13 Out of 28
A weighted test. If this test is worth 10% of your final grade, 46.43% gives you about 4.64 of those 10 points. At a 20% weight, it gives about 9.29 of 20.
Averaging with your next test. If your next 28-question test is a perfect 28/28, the two scores average 73.21%, which is a C. If it is 14/28, they average 48.21%, which is an F.
Reaching the next grade. To reach a D you need 16.8/28 (60%). On a whole-number test, that means 17 correct answers.
How to Improve Your Grade
The first goal is 17/28, the 60% passing line. Ask your teacher for feedback on the questions you missed, and plan short study sessions instead of one long one.
- Ask your teacher to go over the questions you missed with you.
- Study one topic at a time, starting with the one that cost you the most points.
- Aim for 17/28 on the next test to reach the passing line, then build toward a C.
Frequently Asked Questions
Is 13 Out of 28 a Good Grade?
No. 13 out of 28 is 46.43%, an F. It is below the usual passing mark of 60%.
Is 13 Out of 28 Passing?
No. 46.43% is below the usual passing mark of 60%.
What Is 13/28 as a Percentage?
13 ÷ 28 × 100 = 46.43%.
What GPA Is 13 Out of 28?
46.43% equals a 0.0 GPA on the standard A–F scale and a 0.0 GPA on the plus-minus scale.
How Many More Points Do I Need for the Next Grade?
You need 16.8 out of 28 (60%) for a D. That is 3.8 more points than you have now.
Can I Still Pass the Course With 13 Out of 28?
Yes, in most cases. One test rarely decides a final grade, because your course grade depends on every assignment and its weight. You need 17/28 on a test like this to reach the 60% passing line.
What Grade Is 13 Out of 28 on a 7-Point Scale?
F. A 7-point scale uses cutoffs of 93% (A), 85% (B), 77% (C), and 70% (D), and 13/28 is 46.43%.
What Is 13/28 as a Fraction, Decimal, and Ratio?
13/28 equals 13/28, or 0.4643 as a decimal, and its ratio is 13:28. As a score out of 10, it is 4.64.
Other Scores on a 28-Question Test
Written by
Muhammad Umer Shuaib
Author & Grading Tools Developer, Easy Grader
Muhammad Umer Shuaib builds and maintains the grading calculators on Easy Grader. Before a page goes live, he checks every percentage, letter grade, and GPA conversion against the standard US A–F and plus-minus grading scales, and tests the calculator on real score examples. He writes these guides so students, teachers, and parents can get a clear, accurate answer without doing the math or guessing which scale applies.