The GPA Formula
GPA (Grade Point Average) is calculated by:
- Converting each letter grade to a number (grade points)
- Multiplying by the credit hours for each course
- Dividing total grade points by total credit hours
GPA = Total Grade Points ÷ Total Credit Hours
Calculate Yours Instantly
Use our GPA calculator — supports multiple semesters, letter grades, and cumulative GPA:
The 4.0 Scale
| Letter Grade | 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% |
| F | 0.0 | Below 63% |
Note: Some schools use slightly different scales. Always check your institution's grading policy.
Step-by-Step Example
Let's say you took these courses this semester:
| Course | Grade | Credits |
|---|---|---|
| English 101 | A | 3 |
| Calculus I | B+ | 4 |
| Chemistry | B | 3 |
| History | A- | 3 |
| Art Elective | A | 2 |
Step 1: Convert grades to points
- English: A = 4.0
- Calculus: B+ = 3.3
- Chemistry: B = 3.0
- History: A- = 3.7
- Art: A = 4.0
Step 2: Multiply by credits
- English: 4.0 × 3 = 12.0
- Calculus: 3.3 × 4 = 13.2
- Chemistry: 3.0 × 3 = 9.0
- History: 3.7 × 3 = 11.1
- Art: 4.0 × 2 = 8.0
Step 3: Add up
- Total grade points: 12.0 + 13.2 + 9.0 + 11.1 + 8.0 = 53.3
- Total credits: 3 + 4 + 3 + 3 + 2 = 15
Step 4: Divide
- GPA = 53.3 ÷ 15 = 3.55
Weighted vs Unweighted GPA
Unweighted GPA (4.0 scale)
- All classes treated equally
- Maximum possible: 4.0
- Most common system
Weighted GPA (5.0 scale)
- Honors/AP/IB classes get bonus points
- AP class: A = 5.0, B = 4.0, etc.
- Honors class: A = 4.5, B = 3.5, etc.
- Maximum possible: 5.0
- Rewards students for taking harder classes
Example: An A in AP Chemistry = 5.0 points (weighted) vs 4.0 points (unweighted)
Most colleges recalculate your GPA on their own scale anyway, but a high weighted GPA shows you challenged yourself.
Cumulative GPA
Your cumulative GPA includes all semesters, not just the current one:
Cumulative GPA = (All Total Grade Points) ÷ (All Total Credits)
If Semester 1 was 53.3 points over 15 credits, and Semester 2 is 48.0 points over 14 credits:
- Cumulative = (53.3 + 48.0) ÷ (15 + 14) = 101.3 ÷ 29 = 3.49
What's a "Good" GPA?
| GPA | Assessment | Context |
|---|---|---|
| 3.7+ | Excellent | Dean's List, top graduate schools |
| 3.5-3.69 | Very Good | Competitive for most grad programs |
| 3.0-3.49 | Good | Meets most scholarship requirements |
| 2.5-2.99 | Average | Acceptable for most employers |
| 2.0-2.49 | Below average | Minimum for graduation at most schools |
| Below 2.0 | Academic probation risk | May need to repeat courses |
Reality check: GPA matters most for:
- Graduate school admissions (3.0+ usually required, 3.5+ competitive)
- First job out of college (some employers filter at 3.0)
- Scholarships and honors
After your first job, employers rarely ask about GPA. Experience and skills take over.
If you're trying to figure out the per-class side of the equation — "what do I need on the final?" — see the grade calculator guide for the weighted-average math.
How to Raise Your GPA
Quick Math Reality
The more credits you've completed, the harder it is to move your GPA. Here's how much a 4.0 semester changes things:
| Credits Completed | Current GPA | One Perfect Semester (15 credits) | New GPA |
|---|---|---|---|
| 30 | 2.5 | 4.0 | 3.0 |
| 60 | 2.5 | 4.0 | 2.8 |
| 90 | 2.5 | 4.0 | 2.7 |
The earlier you start improving, the bigger the impact.
Practical Tips
- Retake failed courses — Most schools replace the old grade (check your policy)
- Front-load easier electives — Build momentum early in the semester
- Use office hours — Students who visit professors average 0.5 GPA points higher
- Study groups — Proven to improve performance in STEM courses
- Drop strategically — A W (withdrawal) is better than an F if you're struggling
Key Takeaways
- GPA = Total Grade Points ÷ Total Credit Hours
- The standard scale is 4.0 (A = 4.0, B = 3.0, C = 2.0, F = 0.0)
- Weighted GPA gives bonus points for AP/Honors (up to 5.0)
- A 3.0+ GPA meets most requirements; 3.5+ is competitive for grad school
- The earlier you start improving, the easier it is to raise your GPA
- After your first job, GPA matters far less than experience