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 are letter grades calculated from percentages?
Most US schools map percentages to letters in 10-point bands: 90–100 is an A range, 80–89 a B range, 70–79 a C range, 60–69 a D range, and below 60 an F. Plus/minus splits each band roughly in thirds (e.g. 90–92 = A-, 93–96 = A, 97+ = A+). Individual schools and professors can and do vary the cutoffs.
Do these calculators store my grades?
No. Everything is computed in your browser the moment you press Calculate — nothing is uploaded, saved or seen by anyone else. Refresh the page and it's gone.