Letter Grade Calculator
Reading a Percentage Off the Standard Scale
Once a percentage score is known, converting it to a letter grade is a lookup, not a calculation — but the boundaries between grades are easy to misremember (is 89.5% a B+ or an A-?), and different schools sometimes shift the cutoffs slightly. This calculator applies the conventional US 4.0-scale boundaries so a single numeric score maps to its letter grade and corresponding GPA point value without guessing at the threshold.
| Percentage range | Letter | GPA points |
|---|---|---|
| 97 – 100 | A+ | 4.0 |
| 93 – 96 | 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 |
| 0 – 59 | F | 0.0 |
A score of 89.5% falls at the boundary and rounds to B+ under this scale, since the A- range begins at 90.
Where This Matters
- Reading a syllabus grading scale correctly — confirming exactly where a course's letter-grade cutoffs sit avoids disputing a grade over a misremembered boundary.
- Estimating GPA impact before it's official — converting a known percentage to its GPA point value lets a student estimate the effect on their overall GPA before the letter grade posts.
- International grade conversion — students moving between school systems that report percentages and systems that report letters use this scale as a reference point (though official transcript evaluations may apply a school-specific scale).
How to Use This Calculator
- Enter a numeric score between 0 and 100.
- Select Calculate to see the corresponding letter grade and GPA point value.
Related Calculations
To convert a raw correct/total score first, use the Exam Score Calculator, or roll several letter grades into a GPA with the GPA Calculator.