Letter Grade Scale and Percentage Chart
Last updated: October 11, 2026
There is no single letter grade scale that every school uses. The scales below are common in the United States. Your syllabus or school handbook has the one that applies to you.
Basic scale
- A: 90–100% (4.0)
- B: 80–89% (3.0)
- C: 70–79% (2.0)
- D: 60–69% (1.0)
- F: below 60% (0.0)
Scale with plus and minus grades
- A+: 97–100% (4.0)
- A: 93–96% (4.0)
- A−: 90–92% (3.7)
- B+: 87–89% (3.3)
- B: 83–86% (3.0)
- B−: 80–82% (2.7)
- C+: 77–79% (2.3)
- C: 73–76% (2.0)
- C−: 70–72% (1.7)
- D+: 67–69% (1.3)
- D: 63–66% (1.0)
- D−: 60–62% (0.7)
- F: below 60% (0.0)
Some schools count an A+ as 4.3 instead of 4.0.
Why scales differ
Some schools start an A at 93% or 94%, and some set a different cutoff for passing. Colleges and individual teachers can also set their own. If your cutoffs are different, use yours.
Match the calculator to your school
In Grade Calculator you can adjust the letter grade cutoffs so the letter shown next to your class grade matches your school. To turn letter grades into a GPA, use the GPA calculator or read how to calculate your GPA.