School Grade Calculator - Percentage to Letter Grade
Convert a percentage score into its corresponding letter grade using a standard grading scale.
%
Letter Grade
B+
How the Percentage-to-Letter Grade Lookup Works
Enter a percentage score, and this calculator looks up the corresponding letter grade using a standard US grading scale. This is a simple lookup tool — if you instead want to know what score you need on an upcoming exam to reach a target overall grade, see our Final Grade Calculator, which solves that algebra problem for you.
Standard Grading Scale
| Percentage | Letter Grade |
|---|---|
| 97-100% | A+ |
| 93-96% | A |
| 90-92% | A- |
| 87-89% | B+ |
| 83-86% | B |
| 80-82% | B- |
| 77-79% | C+ |
| 73-76% | C |
| 70-72% | C- |
| 67-69% | D+ |
| 63-66% | D |
| 60-62% | D- |
| Below 60% | F |
Example
A score of 88% falls in the 87-89% range, which corresponds to a B+. A score of 91% falls in the 90-92% range, corresponding to an A-.
Common Use Cases
- Quickly converting a graded assignment or test percentage into a letter grade.
- Checking how a specific score translates on a standard scale.
- Understanding the typical boundaries between adjacent letter grades.
FAQs
Does every school use this exact scale?
No — this reflects a commonly used standard US grading scale, but individual schools, districts, universities, and countries often use their own variations (some don't use +/- grades at all, some shift the cutoffs by a few points). Always check your specific school or instructor's syllabus for the scale that actually applies to you.
How is this different from the Final Grade Calculator?
This tool is a straightforward lookup — you already have a percentage and just want the matching letter grade. The Final Grade Calculator works backward, solving algebraically for the score you'd need on a remaining assignment or exam to hit a target overall grade.
Do other countries use letter grades the same way?
No — many countries use entirely different scales, such as numeric grades out of 10 or 20, GPA-only systems, or pass/fail marks. This tool follows the common US-style A-F letter grade convention.