What Grade Is 72 out of 80?
72 out of 80 is 90% — an A- on the standard US scale, an excellent score.
- Percentage90%
- Letter gradeA-
- Missed8 pts
- For an A (90%)72/80
Score breakdown for a 80-point test
| Score | Percent | Letter |
|---|---|---|
| 72/80 | 90% | A- |
| 64/80 | 80% | B- |
| 56/80 | 70% | C- |
| 72/80 | 90% | A- |
How this is calculated
Divide the points earned by the points possible and multiply by 100: 72 ÷ 80 × 100 = 90%. On the common 10-point-band scale that lands in the A- range.
Common questions
What's the difference between weighted and unweighted averages?
An unweighted average treats every score equally: add them up, divide by the count. A weighted average multiplies each category by its share of the grade first — homework 20%, midterms 40%, final 40% — which is how most courses actually work. If your syllabus lists category percentages, you need the weighted version.
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.