Understanding the 4.0 GPA Scale
The 4.0 GPA scale is the standard grading system used by most colleges and universities in the United States. Each letter grade corresponds to a specific GPA point value, which is then used to calculate your overall Grade Point Average.
GPA Conversion Table: Letter Grades to GPA Points
| Letter Grade | GPA Points | Percentage Range | Grade Description |
|---|---|---|---|
| A+ / A | 4.0 | 93-100% | Excellent |
| A- | 3.7 | 90-92% | Excellent |
| B+ | 3.3 | 87-89% | Above Average |
| B | 3.0 | 83-86% | Good |
| B- | 2.7 | 80-82% | Good |
| C+ | 2.3 | 77-79% | Average |
| C | 2.0 | 73-76% | Average |
| C- | 1.7 | 70-72% | Below Average |
| D+ | 1.3 | 67-69% | Poor |
| D | 1.0 | 63-66% | Poor |
| F | 0.0 | Below 63% | Failing |
How to Calculate GPA Using the Scale
To calculate your GPA using this scale:
- For each course, find the GPA point value of your letter grade
- Multiply that GPA point value by the number of credit hours for the course (this gives you “quality points”)
- Add up all quality points from all courses
- Divide total quality points by total credit hours
Example: If you earn an A (4.0) in a 3-credit course and a B (3.0) in a 4-credit course:
- Quality points: (4.0 × 3) + (3.0 × 4) = 12 + 12 = 24
- Total credits: 3 + 4 = 7
- GPA: 24 ÷ 7 = 3.43
Use our free GPA Calculator to instantly calculate this for all your courses.
Weighted vs. Unweighted GPA Scale
The 4.0 scale described above is the unweighted scale. A weighted scale adds bonus points for advanced coursework:
- AP (Advanced Placement) courses: +1.0 points (so an A in AP = 5.0)
- Honors courses: +0.5 points (so an A in Honors = 4.5)
- IB (International Baccalaureate) courses: +1.0 points
Weighted GPAs can exceed 4.0. Most colleges recalculate to unweighted GPA for standardized comparison.
Frequently Asked Questions — GPA Scale
What is a good GPA on a 4.0 scale?
A GPA of 3.0 or higher is generally considered good. A 3.5+ is very good and competitive for most programs. A 3.7+ is excellent.
What percentage is a 3.0 GPA?
A 3.0 GPA corresponds to approximately 83-87% on a 100-point scale, which is a solid B average.