What Grade Is 12 out of 30?
12 out of 30 is 40% — a F on the standard US scale, a failing score.
- Percentage40%
- Letter gradeF
- Missed18 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- |
| 12/30 | 40% | F |
How this is calculated
Divide the points earned by the points possible and multiply by 100: 12 ÷ 30 × 100 = 40%. On the common 10-point-band scale that lands in the F range — you'd have needed 27/30 to reach the A band.
Common questions
Do professors round up borderline grades?
Entirely at their discretion, and policies vary wildly: some round anything above .5, some round at .45, some never round, and some round only for students who attended office hours or showed improvement. If you're within half a point of a boundary, it is always worth a polite question — before finals week, not after grades post.
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.