GPA Calculator

How the GPA Calculator Works — and Why Your GPA Matters More Than You Think

Grade Point Average — GPA — is the single number most colleges, graduate schools, and many employers use to summarize your entire academic performance. It compresses years of classes, grades, and effort into one figure on a 4.0 scale. Whether you're a high school student preparing for college applications, a university student keeping an eye on scholarship requirements, or an adult returning to school, understanding exactly how GPA is calculated helps you make smarter decisions. Should you retake that C? How much will an A in one extra class move the needle? What's the difference between a weighted and unweighted GPA? Our GPA calculator answers these questions in seconds: enter your courses, credits, and grades, and get your cumulative GPA instantly.

The formula behind it

GPA is a weighted average of your grades, where each course counts for as many credits as it's worth. The formula is: GPA = (sum of grade points × credits) ÷ (sum of total credits). Each letter grade converts to a number on the 4.0 scale: A = 4.0, A− = 3.7, B+ = 3.3, B = 3.0, B− = 2.7, C+ = 2.3, C = 2.0, C− = 1.7, D+ = 1.3, D = 1.0, D− = 0.7, F = 0.0. Suppose you take three courses: a 4-credit class with a B (3.0), a 3-credit class with an A (4.0), and a 2-credit class with a C (2.0). Your GPA is (4×3.0 + 3×4.0 + 2×2.0) ÷ (4 + 3 + 2) = (12 + 12 + 4) ÷ 9 = 28 ÷ 9 = 3.11. The key insight: a high-credit course affects your GPA far more than a low-credit one.

Weighted vs. unweighted GPA

Many high schools use a weighted GPA that awards extra points for Honors, Advanced Placement (AP), or International Baccalaureate (IB) courses. In a common weighting scheme, an A in a regular class is worth 4.0, an A in an Honors class is worth 4.5, and an A in an AP or IB class is worth 5.0. The result is that a weighted GPA can go above 4.0 — some students graduate with a 4.5 or higher. But here's the tricky part: colleges receive both your weighted and unweighted GPA, and different colleges weigh them differently. Some recalculate your GPA using their own formula. Others look at the unweighted number to compare students from schools with different grading policies. When applying, check each college's specific policy so you understand exactly what they'll see.

How colleges actually use your GPA

Your GPA is rarely evaluated on its own. Admissions officers look at your course load — did you take the hardest classes available? — as much as the number itself. A 3.7 with a rigorous schedule often impresses more than a 4.0 with easy classes. They also consider the trend: a student who struggled early and improved steadily tells a different story than one whose grades slipped over time. And they compare you to your school context — a 3.8 at a school where the median is 3.2 is treated differently than the same number at a school where most students get 3.9s. Finally, most graduate programs (law, medical, MBA) recalculate your GPA using their own rules, often looking only at the last 60 credits or excluding certain courses.

Limitations and common mistakes

The most common mistake is forgetting that not all grades count equally. Many colleges exclude Pass/Fail courses from GPA calculation entirely, and some distinguish between an A− and an A (worth 3.7 vs. 4.0) while others round them both to 4.0. Retaking a course often replaces the original grade in your GPA calculation at some schools but averages the two at others — a small difference that can swing your GPA by several tenths. Transfer credits frequently don't count toward your GPA at all. And international grading systems vary wildly: a UK “First” or an Indian “Distinction” doesn't map cleanly to a US letter grade. This calculator gives you an accurate number for the data you enter, but always verify the specific rules of any institution evaluating your record.