What Grade Is 13 out of 16?
13 out of 16 is 81.25% — a B- on the standard US scale, a good score.
- Percentage81.25%
- Letter gradeB-
- Missed3 pts
- For an A (90%)15/16
Score breakdown for a 16-point test
| Score | Percent | Letter |
|---|---|---|
| 15/16 | 93.75% | A |
| 13/16 | 81.25% | B- |
| 12/16 | 75% | C |
| 13/16 | 81.25% | B- |
How this is calculated
Divide the points earned by the points possible and multiply by 100: 13 ÷ 16 × 100 = 81.25%. On the common 10-point-band scale that lands in the B- range — you'd have needed 15/16 to reach the A band.
Common questions
How many points is each letter grade worth on a test?
On the standard scale, each letter band spans 10 percentage points, so on a 50-point test a letter grade is about 5 points, and on a 20-point quiz it's about 2. That's why one careless mistake matters more on short assessments — a single 2-point question on a 20-point quiz is an entire letter grade.
Is a 90 an A or an A-?
In plus/minus systems, 90–92 is typically an A- and 93+ is an A, which affects GPA (3.7 vs 4.0). In straight-letter systems, everything from 90 up is simply an A. This calculator shows the plus/minus convention because it's the most common — your syllabus decides which applies to you.