Letter Grade to Percentage Calculator
Convert letter grades (A+, A, B, C, D, F) to equivalent percentage marks and 4.0 GPA points. Instant, free conversion tool for students and applications.
Note: Percentage ranges for letter grades vary between institutions, grading boards, and countries. This calculator uses the standard 4.0 College Board benchmark.
Select Your Input Mode
Select your academic letter grade.
Letter Grade to Percentage Conversion Table
Quick reference overview of the standard US letter grades and their equivalent percentage ranges and 4.0 GPA points:
| Letter Grade | Standard Percentage Range | 4.0 Scale GPA Points |
|---|---|---|
| A+ | 97% - 100% | 4.00 |
| A | 93% - 96% | 4.00 |
| A- | 90% - 92% | 3.70 |
| B+ | 87% - 89% | 3.30 |
| B | 83% - 86% | 3.00 |
| B- | 80% - 82% | 2.70 |
| C+ | 77% - 79% | 2.30 |
| C | 73% - 76% | 2.00 |
| C- | 70% - 72% | 1.70 |
| D+ | 67% - 69% | 1.30 |
| D | 65% - 66% | 1.00 |
| F | 0% - 64% | 0.00 |
Frequently Asked Questions
In standard US university grading, an A represents 93% to 96%, with an A- starting at 90%.
Use the institutional midpoint or standard benchmark ranges when official percentage breakdowns are not provided.
A C- is typically a marginal pass for general undergraduate credit, though many degree majors require a minimum of C or 2.0 to fulfill prerequisites.