Calculate weighted and unweighted GPA from course grades and credit hours with 4.0 and 5.0 scale support.
Enter each course name, credit hours, and letter grade.
Click calculate to see your cumulative grade point average.
Try different grades to see how they would affect your GPA.
A GPA is a credit-weighted average, not the mean of your letter grades. A C in a four-credit lab course pulls the number four times harder than a C in a one-credit seminar. This calculator converts each grade to points on a 4.0 or 5.0 scale, multiplies by credit hours, divides by total credits, and returns the GPA for the course list you enter. The surprise is that weighted and unweighted answer different questions: an A in AP Calculus is worth 4.0 unweighted and 5.0 weighted, and neither number is wrong.
A concrete input and expected output from the current implementation.
Input
Scale: unweighted 4.0. Courses: Biology, A, 4 credits (AP); English, B, 3 credits; History, C, 3 credits. Then the same list recomputed on the weighted 5.0 scale.
Expected output
Unweighted GPA: 3.10. Weighted GPA (AP Biology counted at 5.0): 3.50.
Points per credit: Biology 4 x 4.0 = 16, English 3 x 3.0 = 9, History 3 x 2.0 = 6, totaling 31 over 10 credits, so 31 / 10 = 3.10. On the weighted scale Biology becomes 4 x 5.0 = 20, totaling 35, so 35 / 10 = 3.50.
Every grade becomes points on the chosen scale, and each course contributes points times credit hours to a running total. The GPA is the sum of those weighted points divided by the sum of all credit hours. That is why the arithmetic average of the letter grades almost never matches the reported GPA, and why a low grade in a high-credit course hurts far more than the same grade in a low-credit one.
The unweighted scale runs 0.0 to 4.0 with A = 4.0, B = 3.0, C = 2.0, D = 1.0, F = 0.0. The weighted scale adds difficulty points, typically one extra point for AP, IB, or honors courses, so an A can count 5.0 and the result can exceed 4.0. The same transcript therefore yields a different number on each scale, and colleges usually recalculate their own version from the raw transcript anyway.
Schools differ on plus/minus mapping, which courses earn honors points, whether repeated courses count once or twice, and whether electives and PE are included. The calculator applies the rules you select. If the numbers disagree, work out which of those choices differs, and treat your school's official figure as authoritative for applications.
Yes, that is normal when AP, IB, or honors courses are included, because an A in those classes is worth 5.0 points. A 4.0 weighted average means roughly all A's in regular courses, while a 5.0 weighted average means all A's in every AP course. Colleges typically convert transcripts to their own scale when evaluating applicants.
The example and behavioral notes were checked against the browser implementation. Standards and primary references below define the relevant format, formula, or platform behavior.
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