Cumulative GPA Calculator
Enter the GPA you already have, the credits behind it, then this term's courses. The result is the combined credit-weighted average.
How to fill it in
Take the two numbers from your current transcript: the cumulative GPA at the top of the page, and the total credits earned (not attempted). Then list this term's courses exactly as you would on the GPA calculator.
The formula
New GPA = (old GPA × old credits + Σ(new grade point × new credits)) ÷ (old credits + new credits)
The whole calculation exists because a GPA is a ratio of quality points to credits, and ratios do not average. Adding 15 credits of 3.8 to 60 credits of 3.2 does not give you 3.50.
Why averaging two GPAs is wrong
| Method | Arithmetic | Result |
|---|---|---|
| Simple average of the two GPAs | (3.20 + 3.80) ÷ 2 | 3.50 |
| Credit-weighted (correct) | (3.20×60 + 3.80×15) ÷ 75 | 3.32 |
The simple average overstates the improvement by 0.18 because it treats one semester of 15 credits as equal in weight to three semesters of 60. The longer your transcript, the bigger the gap — which is also why senior-year grades move the number far less than freshmen expect.
Watching it accumulate
| Term | Term GPA | Credits | Quality points | Cumulative |
|---|---|---|---|---|
| Fall | 3.00 | 12 | 36.0 | 3.00 |
| Spring | 3.40 | 18 | 61.2 | 3.24 |
| Fall | 3.90 | 15 | 58.5 | 3.46 |
45 credits, 155.7 quality points, 3.46. A plain average of the three term GPAs gives 3.43 — only 0.03 off here, but the drift grows with every uneven credit load.
Faster ways to move the number
- More credits, not just better grades. A 3.9 term over 18 credits changes the cumulative figure more than a 4.0 term over 9.
- Grade replacement beats retaking. If your school replaces a failed grade, one replacement can move the cumulative number more than a year of B+ grades.
- Late-stage math. At 90 earned credits, a perfect 15-credit term lifts a 3.00 to about 3.14. The same term at 30 credits lifts it to 3.33.
Common questions
Can my cumulative GPA drop after a good semester?
Yes — if the term GPA is below your running cumulative GPA, the combined figure falls even though the semester looks fine on its own. A 3.5 term against a 3.7 cumulative pulls the total down.
Which credits do I enter — attempted or earned?
Earned credits, meaning the ones that actually count toward the degree. Withdrawn courses and failed courses still appear in the attempted total but usually contribute zero quality points, and mixing the two numbers is the most common way people get a wrong answer here.
Do transfer credits change the cumulative GPA?
At most institutions transfer work is recorded as credit without a grade, so it raises credits earned and leaves the GPA untouched. A few schools do import the grades; your transcript will show which case applies.