What Grade Is 20 out of 30?
20 out of 30 is 66.67% — a D on the standard US scale, a below-average score.
- Percentage66.67%
- Letter gradeD
- Missed10 pts
- For an A (90%)27/30
Score breakdown for a 30-point test
| Score | Percent | Letter |
|---|---|---|
| 27/30 | 90% | A- |
| 24/30 | 80% | B- |
| 21/30 | 70% | C- |
| 20/30 | 66.67% | D |
How this is calculated
Divide the points earned by the points possible and multiply by 100: 20 ÷ 30 × 100 = 66.67%. On the common 10-point-band scale that lands in the D range — you'd have needed 27/30 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 3.5 GPA good?
On the standard 4.0 scale, 3.5 sits between an A- and B+ average — comfortably above the typical US college average (around 3.1) and competitive for most graduate programs, internships and scholarships, though the most selective programs skew 3.7+. Trend matters too: an upward trajectory reads better than a flat one.