GPA Calculator
Calculate semester and cumulative GPA. Add courses with credits and letter grades.
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When to use this
It's midway through the semester and you're trying to figure out what you need on your remaining finals to hit a 3.5 for Dean's List. Or you just got your grades back and want to see how this semester affects your cumulative GPA. Maybe you're applying to graduate school and need to verify your GPA calculation matches what your transcript will show. This calculator handles all of it.
The semester calculator lets you enter each course with its credit hours and letter grade. The cumulative calculator takes your existing GPA and total credit hours, then adds this semester's results to project your new overall GPA. Use it to plan ahead: if you're sitting at a 3.4 cumulative with 90 credits, what does this semester need to look like to push you over 3.5?
It's also useful for transfer students figuring out how their GPA translates, students considering retaking a course to replace a grade, or parents trying to understand how the GPA system works. The math is simple in concept but tedious to do by hand when you have five or six courses with different credit weights.
Good to know
The formula is a weighted average: GPA = Sum(credits x grade points) / Sum(credits). A 4-credit A (4.0) contributes 16 quality points. A 3-credit B+ (3.3) contributes 9.9 quality points. Add all quality points, divide by total credits. This means a high-credit course has a bigger impact on your GPA — getting an A in a 4-credit class matters more than getting an A in a 1-credit elective.
Plus/minus grades make a real difference. The gap between a B+ (3.3) and a B- (2.7) is 0.6 points — in a 4-credit course, that's 2.4 quality points. Over a college career of 120+ credits, these fractional differences accumulate and can determine whether you graduate with honors or just miss the cutoff.
Your cumulative GPA gets harder to move over time. With 30 credits completed, one bad semester can drop your GPA significantly. With 100 credits completed, the same bad semester barely moves the needle — but it also means recovering from a low GPA takes multiple strong semesters. This is the "GPA momentum" effect that makes early performance disproportionately important.
Some schools use a different scale. The standard 4.0 scale is most common in the US, but some institutions cap A+ at 4.0 (same as A), while others give A+ a 4.3. This calculator uses the most common scale where A and A+ both equal 4.0.
Quick Reference
| Letter Grade | Grade Points | Typical Percentage |
|---|---|---|
| A / A+ | 4.0 | 93–100% |
| 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% |
| D | 1.0 | 60–69% |
| F | 0.0 | Below 60% |