Letter Grade Calculator
Letter grade calculator
Convert scores, weight categories, and find the grade you need — all in one place
Not sure what letter grade your percentage translates to? A letter grade calculator instantly converts any percentage or score into its corresponding letter grade — no need to memorize grading scales. Whether your school uses a standard scale or a custom one, this grade scale calculator gives you an accurate answer in seconds.
This tool also supports grade curve calculator adjustments, so if your instructor applies a curve to the class, you can see how it affects your final letter grade.
Why Students Use a Letter Grade Calculator
Letter grades are often what actually appears on report cards and transcripts, which is why this tool is so useful:
- Instantly convert a percentage into a letter grade using a letter grade calculator.
- Use it as a grade scale calculator to compare different grading systems (standard, plus/minus, 10-point scale).
- Apply a curve grade calculator adjustment to see your grade after a class curve.
- Double-check a reported letter grade against your actual percentage score.
- Understand what percentage range is needed to reach the next letter grade up.
- Compare grading scales across different schools or courses.
Since grading scales aren’t universal, this tool helps clear up confusion when moving between classes, schools, or institutions that use different systems.
How the Letter Grade Calculator Works
To use this grade scale calculator, you only need one number: your percentage score. The calculator then matches that percentage to the correct letter grade based on the grading scale selected (standard, plus/minus, or a custom scale).
Standard Grading Scale Reference
Letter Grade to GPA Scale
Standard US college grading scale and GPA conversion.
| Letter Grade | US Colleges (%) | Plus/Minus Scale (%) | GPA Value |
|---|---|---|---|
| A+ | 97–100 | 90–100 | 4.0 |
| A | 93–96 | — | 4.0 |
| A− | 90–92 | — | 3.7 |
| B+ | 87–89 | 80–89 | 3.3 |
| B | 83–86 | — | 3.0 |
| B− | 80–82 | — | 2.7 |
| C+ | 77–79 | 70–79 | 2.3 |
| C | 73–76 | — | 2.0 |
| C− | 70–72 | — | 1.7 |
| D+ | 67–69 | 60–69 | 1.3 |
| D | 63–66 | — | 1.0 |
| F | Below 60 | Below 60 | 0.0 |
Always confirm the exact scale used by your school or instructor, since ranges can vary.
Letter Grade Calculation Example
Let’s say you scored 88% on a course and want to know your letter grade using this letter grade calculator:
Grade Conversion Result
Percentage score converted to letter grade and GPA.
| Detail | Value |
|---|---|
| Percentage Score | 88% |
| Letter Grade (Standard Scale) | B+ |
| GPA Value | 3.3 |
Using the Grade Curve Calculator
Sometimes an instructor applies a curve to adjust the whole class’s grades. Here’s how a curve typically changes your result:
Types of Grade Curves
Common ways instructors adjust scores after a test.
| Type of Curve | How It Works | Example |
|---|---|---|
| Flat Point Curve | Adds a fixed number of points to every score | 82% + 5 points = 87% |
| Percentage Curve | Increases score by a percentage of points missed | 82% + 10% of (100−82) = 83.8% |
| Highest-Score Curve | Adjusts scale so the top score becomes 100% | Top score 92% becomes new 100% baseline |
Curve methods vary by instructor — always confirm which method your class uses before recalculating your grade.
Faqs
Conclusion
A letter grade calculator takes the guesswork out of converting percentages into letter grades, while a grade scale calculator helps you compare different grading systems side by side. If your class applies a curve, the curve grade calculator section shows exactly how that adjustment impacts your final result. For a complete picture of your academic standing, pair this tool with our GPA grade calculator to see how your letter grades translate into your overall GPA.