GPA explained (with formulas and examples)
GPA (Grade Point Average) is a standardized way to summarize academic performance. Most schools calculate GPA by converting letter grades into grade points and weighting them by the number of credits. The key idea is that a higher credit course has more impact on GPA than a lower credit course.
Step 1: Convert grades to points
Each letter grade maps to grade points (example: A = 4.0, B = 3.0). This calculator uses a common 4.0 scale with plus/minus.
Step 2: Compute quality points
Quality Points = Credits × Grade Points. Example: A (4.0) in a 3 credit class = 3 × 4.0 = 12 quality points.
Step 3: Divide totals to get GPA
Term GPA = (Sum of Quality Points) ÷ (Sum of Credits). This produces a weighted average where credits are the weights.
Cumulative GPA = (Previous Points + Term Points) ÷ (Previous Credits + Term Credits). If your transcript shows "total credits attempted" and "total grade points," use those values.
Worked example (term GPA)
Suppose you have three classes:
- English, 3 credits, A (4.0) → 12.0 points
- Algebra, 4 credits, B+ (3.3) → 13.2 points
- History, 3 credits, B (3.0) → 9.0 points
Total points = 12.0 + 13.2 + 9.0 = 34.2
Total credits = 3 + 4 + 3 = 10
GPA = 34.2 ÷ 10 = 3.42
How to raise your GPA
- Target high credit courses: improving a 4 credit class usually moves GPA more than a 1 credit class.
- Know the breakpoints: moving from B (3.0) to B+ (3.3) can matter over many credits.
- Retake policy: some schools replace the old grade, others average. Check your policy.
- Plan ahead: use "Fill example" then adjust grades to see what you need to hit your goal.
Important note
GPA rules vary by school (weighting, pass/fail, withdrawals, repeats). Always confirm with your school's official policy or transcript.
Common GPA questions
What is an "unweighted" GPA?
An unweighted GPA uses the same 0.0 to 4.0 scale for every class. A weighted GPA adds extra points for honors, AP, or IB courses.
Why does credits matter?
GPA is a weighted average. Credits are the weights. A 4 credit class counts more than a 1 credit class because it represents more academic work.