GPA

How to Calculate GPA With Course Credits

GPA, as used on this site, is a credit-weighted average of grade points. It is not the average of letter grades treated as equals, and it is not a percentage. The GPA calculator implements GPA = Σ (credits × grade points) / Σ included credits on an example 4.0 table.

That table is labeled as an example. It is not a claim that every school uses these values.

What GPA represents

Each included course contributes quality points equal to credit hours times the grade-point value of the letter. The GPA is those quality points divided by the credits that were included. A four-credit course therefore pulls the average more than a one-credit course with the same letter.

Grade points and credit hours

Grade points are the numeric stand-ins for letters. Credit hours (sometimes called units) are the course size. Both must be valid numbers. Credits must be positive. Zero included credits is rejected; there is nothing to divide by.

Quality points

Quality points = credits × grade points. Three credits of A at 4.0 produce 12 quality points. Four credits of B+ at 3.3 produce 13.2. You add quality points across included courses, then divide by total included credits.

Credit-weighted averages

Example: Course A, 3 credits, A (4.0); Course B, 4 credits, B+ (3.3); Course C, 3 credits, B (3.0). Quality points = 12 + 13.2 + 9 = 34.2. Credits = 10. GPA = 3.420. If you averaged the three letters as (4.0+3.3+3.0)/3 = 3.433, you would ignore that the B+ sat on four credits. The credit-weighted figure is the one this calculator reports.

Second example: replace Course C with a 1-credit A. Quality = 12 + 13.2 + 4 = 29.2 over 8 credits = 3.650. Same letters as a 3-credit A would have produced a different GPA; size matters.

Example 4.0 scale and plus/minus grades

The example map is A+ 4.0, 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. Some institutions give A+ a 4.3. Some omit A+. Some skip D−. If your campus PDF disagrees, the campus PDF wins. You can still use this ledger to practice the weighted-average structure.

Excluded course grades

Pass, fail without grade points, withdrawn, incomplete, and audit are offered as labels and then omitted from the GPA under the example convention. The calculator will not invent 4.0 for Pass or 0.0 for Withdrawn. Fail as a letter F is 0.0 and is included, which is different from “Fail (no points).” Those two fail-like marks are easy to confuse; the dropdown names them separately. This exclusion rule is not a universal institutional rule.

Why schools may calculate GPA differently

Repeated-course forgiveness, transfer-credit inclusion, major GPA versus cumulative GPA, and A+ caps all change official numbers. A calculator that cannot see your transcript cannot apply those policies. Checking official grading policies means reading the registrar’s catalog, not rereading this paragraph.

Course percentages still live in the points calculator and letter converter. They feed letters; GPA starts after letters exist. Formulas: grade formulas.

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