College GPA Calculator
Calculate your new semester GPA and updated cumulative GPA in one place. Enter your current cumulative GPA and completed credits, then list this semester's courses to see exactly where you'll stand at term's end.
Step 1 — Your Cumulative Record
Step 2 — This Semester's Courses
Results
Reverse Calculator — What GPA Do I Need?
Find out the GPA you'd need to earn over a number of future credits to reach a target cumulative GPA.
Uses your current cumulative GPA and credits from Step 1.
How Cumulative GPA Works
Your cumulative GPA is the total grade points you've ever earned divided by the total credit hours you've ever attempted (excluding pass/fail). When you add a new semester:
New Cumulative = (Old GPA × Old Credits + Semester Points) ÷ (Old Credits + Semester Credits)
This is why a single great or bad semester moves your cumulative GPA less and less as you accumulate more credits — math, not magic.
How This Calculator Works
The calculator handles three jobs at once. For your new semester GPA, it converts each course's letter grade to grade points on the 4.0 scale (A = 4.0, A- = 3.7, B+ = 3.3, and so on), multiplies by that course's credit hours to get quality points, sums them, and divides by the semester's total credits. That's the same quality-point method registrars use — not a simple average of letter grades, which is the single most common GPA mistake students make.
For your new cumulative GPA, it rebuilds your prior record by multiplying your old GPA by your completed credits to recover your historical quality points, adds this semester's points, and divides by the combined credit total: New Cumulative = (Old GPA × Old Credits + Semester Points) ÷ (Old Credits + Semester Credits). The reverse tool inverts that relationship to tell you the average GPA you'd need across a block of future credits to hit a target cumulative figure.
A Worked Example
Say you've completed 60 credits with a 3.45 cumulative GPA, and this semester you take Organic Chemistry (4 cr, B+ = 3.3), Calculus II (4 cr, A- = 3.7), World Literature (3 cr, A = 4.0), and Microeconomics (3 cr, B = 3.0). Semester quality points are 13.2 + 14.8 + 12.0 + 9.0 = 49.0 over 14 credits, a semester GPA of 3.50.
Your prior 60 credits at 3.45 represent 207.0 quality points. Add the 49.0 new points for 256.0 total over 74 credits: 256.0 ÷ 74 = 3.46. Notice the strong 3.50 semester only nudged your cumulative from 3.45 to 3.46 — proof of how much weight your existing 60 credits carry.
What Affects Your Result
- Credit hours per course — a 4-credit lab moves your GPA nearly twice as much as a 1-credit seminar at the same grade.
- Total credits already completed — the larger your history, the slower any single term shifts the cumulative number.
- Plus/minus grading — schools that award A- = 3.7 and B+ = 3.3 produce different totals than straight-letter systems.
- Pass/fail and audited courses — these usually earn credit but no grade points, so they're excluded from the average.
- Repeated courses — grade-replacement versus grade-averaging policies change how a retake lands.
- Whether transfer credit counts — most schools exclude transfer grades from the cumulative GPA entirely.
Frequently Asked Questions
Why does my cumulative GPA barely move after a good semester?
Cumulative GPA is an average weighted by every credit you've ever taken. Once you've completed 60 or more credits, a single 15-credit semester is only a quarter of your record, so even straight A's nudge the total modestly. The more credits you accumulate, the more inertia your GPA carries.
Do pass/fail courses count toward my GPA?
Generally no. Pass/fail and credit/no-credit courses award credit hours toward graduation but carry no grade points, so they're excluded from the GPA average. Always confirm with your registrar, since a failing grade in a pass/fail course sometimes does count as an F.
How does retaking a course affect my cumulative GPA?
It depends on your school's grade-replacement policy. As a former academic advisor, I saw this trip students up constantly: some institutions replace the original grade entirely so only the retake counts, while others average both attempts. The replacement case can raise your GPA noticeably; the averaging case helps far less.
Does transfer credit factor into my GPA here?
At most colleges transfer credits count toward your degree requirements but aren't included in your cumulative GPA, which reflects only coursework taken at your current institution. Enter only your home-institution GPA and credits in Step 1 for an accurate projection.