Number to Letter Grade Converter
Convert a percentage score to a letter grade using standard or custom grading scales. Review the matching letter grade, GPA points, and grade description.
Letter to Number Grade Converter
Convert letter grades to GPA points and percentages. Supports A+ through F with plus/minus modifiers on the standard 4.0 scale.
Grade Points⧉
3.3
on 4.0 scale
Percentage Range⧉
87% – 89%
typical US scale
| Letter | Grade Points | Percentage |
|---|---|---|
| A+ | 4.0 | 97–100% |
| A | 4.0 | 93–96% |
| A- | 3.7 | 90–92% |
| B+ | 3.3 | 87–89% |
| B | 3.0 | 83–86% |
| B- | 2.7 | 80–82% |
| C+ | 2.3 | 77–79% |
| C | 2.0 | 73–76% |
| C- | 1.7 | 70–72% |
| D+ | 1.3 | 67–69% |
| D | 1.0 | 63–66% |
| D- | 0.7 | 60–62% |
| F | 0.0 | 0–59% |
Planning notes, formulas, and examples
About the Letter to Number Grade Converter
Letter grades are the universal language of academic reporting in the United States, but they don't always translate easily to numeric values. Whether you're calculating your GPA, comparing international grading systems, or entering grades into a spreadsheet, you need a reliable conversion from letters to numbers.
This converter maps each letter grade—from A+ through F, including plus and minus modifiers—to its corresponding grade point value on the standard 4.0 scale. It also shows the typical percentage range associated with each letter grade, giving you a complete picture of what each letter means numerically.
The standard 4.0 scale used by most US colleges assigns A/A+ = 4.0, A− = 3.7, B+ = 3.3, B = 3.0, and so on down to F = 0.0. Some schools cap A+ at 4.0 while others award 4.3. This converter uses the most common convention where A+ = 4.0.
When This Page Helps
GPA calculations require numeric values, not letters. If your transcript shows letter grades and you need to compute your GPA, this converter gives you the exact grade points for each course. It's also essential when comparing your grades across schools that use different grading conventions, or when applying to institutions that require a numeric GPA from a letter-grade transcript.
How to Use the Inputs
- Select or enter a letter grade (A+, A, A−, B+, B, B−, C+, C, C−, D+, D, D−, or F).
- View the corresponding grade point value on the 4.0 scale.
- See the typical percentage range associated with that letter grade.
- Use the grade point value for GPA calculations.
- Enter multiple grades to see a conversion table.
Formula used
Standard 4.0 Scale Mapping:
A+ = 4.0, A = 4.0, A− = 3.7
B+ = 3.3, B = 3.0, B− = 2.7
C+ = 2.3, C = 2.0, C− = 1.7
D+ = 1.3, D = 1.0, D− = 0.7
F = 0.0Example Calculation
Result: 3.3 grade points
A B+ converts to 3.3 grade points on the standard 4.0 scale. The typical percentage range for a B+ is 87–89%. If this were a 3-credit course, it would contribute 3 × 3.3 = 9.9 quality points toward your GPA.
Tips & Best Practices
- Most US colleges use A+ = 4.0, not 4.3. Verify your school's policy.
- Plus/minus modifiers add or subtract 0.3 from the base grade point (except A+ stays at 4.0).
- International grades may not map directly—check your institution's equivalency table.
- Some graduate programs don't award D grades—any grade below C is an F.
- When computing GPA, multiply grade points by credit hours for each course.
The Standard 4.0 Grading Scale
The 4.0 scale is the most widely used grading system in American higher education. Each letter grade maps to a numeric value: A = 4.0, B = 3.0, C = 2.0, D = 1.0, F = 0.0. Plus and minus modifiers adjust these values by +0.3 and −0.3 respectively, with A+ capped at 4.0 at most institutions.
Why Plus/Minus Grading Matters
Schools that use plus/minus grading create a more granular picture of student performance. A student earning an A− has demonstrated mastery slightly below the A threshold but well above B+ level. This granularity is especially important for GPA-sensitive applications like graduate school admissions and scholarship eligibility.
International Grade Conversions
Countries use vastly different grading scales. The UK uses First, Upper Second, Lower Second, and Third class honors. Germany uses a 1.0–5.0 scale where 1.0 is the best. India typically uses a 10-point or percentage system. When converting international grades to the US 4.0 scale, consult your institution's international credential evaluation office.
Sources & Methodology
Last updated:
Frequently Asked Questions
At most US colleges, A+ equals 4.0, the same as an A. Some schools award A+ = 4.3, but this is less common. Check your school's grading policy.
A B+ is 3.3 grade points on the standard 4.0 scale. It represents strong performance, typically corresponding to 87–89%.
No. While the 4.0 scale is standard in the US, some schools use a 5.0 scale for weighted classes, and international systems vary widely. Always check your institution's official grading scale.
Convert each letter grade to its numeric equivalent, multiply by credit hours, sum all quality points, and divide by total credit hours. Use the Semester GPA Calculator for this.
At most colleges, D− (0.7 grade points) is the lowest passing grade for undergraduates. Graduate programs typically require a C (2.0) or higher to pass.
A minus subtracts 0.3 points. An A− (3.7) vs an A (4.0) in a 4-credit course costs 1.2 quality points. Over 40 credits, this could lower your GPA by about 0.03.
More in this topic
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