GPA Calculator
Compute your credit-weighted GPA on the 4.0 scale, course by course.
How the calculator works
Each letter grade maps to a point value on the 4.0 scale: A+ and A earn 4.0, A− earns 3.7, B+ 3.3, and so on down to F at 0.0. Every course's points are multiplied by its credit hours to produce quality points — the real currency of GPA math. The calculator sums quality points across all completed rows and divides by the sum of credit hours, so a 4-credit A and a 1-credit C average to (16 + 0) ÷ 5 = 3.2, not the naive 2.5. Rows left entirely empty are ignored, so you can compute a term GPA or a cumulative GPA from the same form.
Formula
Where:
- grade points — the 4.0-scale value of each letter grade
- credits — the credit hours (or units) assigned to the course
- Σ — the sum across all courses included
Example
Four courses this term: Mathematics (4 credits, A), Physics (4 credits, B+), Literature (3 credits, A−), and History (2 credits, B). Quality points are 16.0 + 13.2 + 11.1 + 6.0 = 46.3, and total credits are 13, so GPA = 46.3 ÷ 13 ≈ 3.56. Raising Physics to an A next term would add 2.8 quality points — enough to lift the average to roughly 3.77, a realistic target once you see the arithmetic.