Percentage to Letter Grade Converter
Enter a percentage score to get the letter grade and GPA equivalent. Or pick a letter grade to see its percentage range.
Last updated June 2026
Grading scale
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Percentage → Letter Grade
Grading scales vary by school — check your syllabus, and adjust the scale above if yours differs.
Letter Grade → Percentage Range
Percentage to Letter Grade Chart
The table below shows the standard US 10-point grading scale used by the majority of American high schools and colleges. Each letter grade covers a 10-percentage-point band, mapping to a GPA value on the 4.0 scale.
| Letter Grade | Percentage Range | GPA (4.0 scale) | Description |
|---|---|---|---|
| A | 90–100% | 4.0 | Excellent |
| B | 80–89% | 3.0 | Above average |
| C | 70–79% | 2.0 | Average |
| D | 60–69% | 1.0 | Below average |
| F | Below 60% | 0.0 | Failing |
Note: some institutions use plus/minus grading with narrower bands (e.g. A- = 90–92%). Check your course syllabus for exact cutoffs.
How the Conversion Works
The standard US grading scale divides the 0–100% range into five letter-grade bands of 10 percentage points each. To convert your percentage:
- If your score is 90% or above, you have an A (4.0 GPA).
- If your score is 80–89%, you have a B (3.0 GPA).
- If your score is 70–79%, you have a C (2.0 GPA).
- If your score is 60–69%, you have a D (1.0 GPA).
- If your score is below 60%, it is an F (0.0 GPA).
See also: GPA Scale Reference for the full plus/minus scale, the GPA to Letter Grade Converter for the reverse lookup, and the What Letter Grade is N% hub for instant per-percentage lookups from 50% to 100%.
Frequently Asked Questions
How do I convert a percentage to a letter grade?
Use the standard 10-point US grading scale: 90–100% = A (4.0 GPA), 80–89% = B (3.0), 70–79% = C (2.0), 60–69% = D (1.0), below 60% = F (0.0). Enter your percentage above and the calculator returns the letter grade and GPA equivalent instantly.
What percentage is an A, B, C, D, or F?
On the standard US 10-point scale: A is 90–100%, B is 80–89%, C is 70–79%, D is 60–69%, and F is anything below 60%. Some schools use a 7-point scale or add plus/minus grades with narrower bands — check your school's syllabus for the exact cutoffs used in your course.
What GPA does my percentage correspond to?
Under the standard 4.0 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. With plus/minus grading the bands narrow — for example A- is typically 90–92% and maps to 3.7 GPA.
Is a 90% always an A?
At most US schools, yes — 90% is the standard cutoff for an A. However, some instructors set the cutoff at 93% (leaving 90–92% as A-), and others curve the class so cutoffs shift. Always check the grading policy in your course syllabus.
Can I convert a letter grade back to a percentage?
Yes — use the reverse lookup in this tool. Select a letter grade and the tool shows the corresponding percentage range and 4.0 GPA value. Note that a letter grade maps to a range of percentages (e.g. B maps to 80–89%), not a single exact value.