Percentage to Letter Grade
Turn a percentage score into a US letter grade and its 4.0-scale GPA point.
88% falls in the 87–89 band, which is a B+ ≈ 3.3 on the 4.0 scale.
On the common US scale, a percentage maps to a letter grade by band: 93–100 is an A (4.0), 90–92 an A− (3.7), 87–89 a B+ (3.3), and so on down to below 60, which is an F (0.0). So 88% = B+ ≈ 3.3 GPA. Exact cut-offs vary by institution.
How percentage-to-letter conversion works
A US letter grade is a band, not a single point — every percentage inside a range earns the same letter. The common scale splits 0–100 into twelve bands from A down to F, and each band carries a GPA point on the 4.0 scale used to compute your grade-point average.
Plus and minus grades sit between the whole letters: an A− (90–92) is worth 3.7, a B+ (87–89) is worth 3.3. The pattern repeats every three percentage points until you reach 60, below which everything is an F worth 0.0. To enter a letter, just find the band your score lands in and read across.
Locate the band your score falls into; the band fixes both the letter and the GPA point.
Worked example
Converting an 88% to a letter grade and GPA point.
- 1 Clamp the score to 0–100. An 88% is already in range, so it stays 88%.
- 2 Find the matching band. 88% falls in the 87–89 range on the common US scale.
- 3 Read the letter grade. The 87–89 band is a B+.
- 4 Read the GPA point. A B+ is worth ≈ 3.3 on the 4.0 scale.
Common US percentage → letter → GPA
The standard plus/minus scale this tool uses. Many institutions shift these cut-offs.
| Percentage | Letter | GPA (4.0) |
|---|---|---|
| 93–100 | A+ / A | 4.0 |
| 90–92 | A− | 3.7 |
| 87–89 | B+ | 3.3 |
| 83–86 | B | 3.0 |
| 80–82 | B− | 2.7 |
| 77–79 | C+ | 2.3 |
| 73–76 | C | 2.0 |
| 70–72 | C− | 1.7 |
| 67–69 | D+ | 1.3 |
| 63–66 | D | 1.0 |
| 60–62 | D− | 0.7 |
| below 60 | F | 0.0 |
Scales vary — read the fine print
Cut-offs differ by school. Some institutions start the A band at 94 or 95, others draw the failing line at 65 or 70, and many do not award an A+ at all. The table above is the most widely published version, not a universal rule — always check your course syllabus or registrar.
Not every school uses plus/minus. On a straight-letter scale there is no A−, B+, or C+: a 90–100 is simply an A worth 4.0, an 80–89 a B worth 3.0, and so on. Some schools also cap the GPA at 4.0, so an A+ earns the same 4.0 as an A rather than a 4.3.
Once you have letters for each course, combine them into an overall figure with the GPA calculator.