Calculate weighted GPA across courses on a 4.0 scale, with cumulative GPA.
Each letter grade maps to grade points on a 4.0 scale (A = 4.0, B = 3.0, and so on). Your GPA is the sum of grade points times credits for every course, divided by your total credits.
GPA = Σ(grade points × credits) ÷ Σ(credits)
A standard unweighted U.S. 4.0 scale with plus/minus steps (A = 4.0, A− = 3.7, B+ = 3.3, etc.). Weighted/AP scales differ by school.
List each course as grade:credits, separated by commas — for example 'A:3, B+:4, C:3'. Credits weight each grade in the average.