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How grade point average is calculated
A GPA is a weighted average, not a plain one. Each course contributes in proportion to its credit hours, so a five-credit module moves your average far more than a one-credit elective with the same grade. This GPA calculator handles the weighting, letting you add courses with their grades and credits and see the cumulative result.
How to use the GPA Calculator
- Add a row for each course.
- Enter the grade and the credit hours for each.
- Add or remove rows as needed.
- Read the weighted GPA at the bottom.
Formula and a worked example
GPA = Σ(grade point × credits) ÷ Σ(credits)
On the common 4.0 scale, A = 4.0, B = 3.0, C = 2.0, D = 1.0 and F = 0. Plus and minus grades usually add or subtract 0.3. Scales differ between institutions, so check your own handbook.
Worked example
Three courses: A (4.0) over 3 credits, B (3.0) over 4 credits and C (2.0) over 3 credits. That is (12 + 12 + 6) = 30 grade points across 10 credits, so the GPA is 3.0. Had the C been the four-credit course instead, the GPA would drop to 2.9.
Frequently asked questions
What is the difference between semester GPA and cumulative GPA?
Semester GPA covers one term; cumulative GPA includes every course you have taken. Add all courses here for the cumulative figure.
Why do credit hours matter?
Because GPA is weighted by them. A poor grade in a heavy course hurts more than the same grade in a light one.
How do I convert a percentage to a GPA?
It depends on your institution. A common mapping is 90–100% → 4.0, 80–89% → 3.0, 70–79% → 2.0, but always check your own scale.
Do failed courses count?
Usually yes — an F contributes 0 grade points while still counting its credits, which is why one failure drags an average down so sharply.
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