A comprehensive reference chart showing how letter grades convert to GPA values on both the standard 4.0 scale and the weighted 5.0 scale, along with percentage equivalents.
| Letter Grade | GPA (4.0 Scale) | GPA (5.0 Weighted) | Percentage |
|---|---|---|---|
| A+ | 4.0 | 5.0 | 97–100% |
| A | 4.0 | 5.0 | 93–96% |
| A- | 3.7 | 4.7 | 90–92% |
| B+ | 3.3 | 4.3 | 87–89% |
| B | 3.0 | 4.0 | 83–86% |
| B- | 2.7 | 3.7 | 80–82% |
| C+ | 2.3 | 3.3 | 77–79% |
| C | 2.0 | 3.0 | 73–76% |
| C- | 1.7 | 2.7 | 70–72% |
| D+ | 1.3 | 2.3 | 67–69% |
| D | 1.0 | 2.0 | 63–66% |
| D- | 0.7 | 1.7 | 60–62% |
| F | 0.0 | 0.0 | Below 60% |
The 4.0 scale is the most widely used GPA system in the United States. It assigns a numerical value to each letter grade, with A (or A+) at the top (4.0) and F at the bottom (0.0). Most high schools and colleges use this scale as the standard for measuring academic performance.
On the 4.0 scale, plus and minus modifiers adjust the grade point value by approximately 0.3 points. For example, a B+ is worth 3.3, a B is 3.0, and a B- is 2.7. Some schools award a 4.3 for an A+, but most cap the scale at 4.0.
The 5.0 weighted scale is used primarily in high schools to reward students who take advanced courses. On this scale, AP (Advanced Placement) and IB (International Baccalaureate) courses receive an extra 1.0 grade point, while honors courses typically receive an extra 0.5 grade point.
The weighted values in the table above reflect the AP/IB bonus. For honors courses, subtract 0.5 from the weighted column (for example, an A in an honors course would be 4.5 instead of 5.0).
The percentage ranges shown above are the most common standard, but grading scales can vary by institution. Some schools use a 10-point scale (A = 90–100%, B = 80–89%, etc.), while others have higher thresholds for each letter grade. Always check your school's specific grading policy.
Use our calculators to quickly convert between grade formats and calculate your GPA: