Quick answerA GPA calculator combines course grades and credit hours to estimate term, cumulative, or weighted grade point average. Each course contributes in proportion to its credit value rather than counting every class equally.
How credit-weighted GPA works
For each course, grade points are multiplied by credit hours to produce quality points. The quality points are added and divided by total attempted credits. A four-credit course therefore has twice the effect of a two-credit course with the same grade.
Cumulative GPA combines previous quality points with new coursework. If only the previous GPA and completed credits are known, multiplying them reconstructs the earlier quality-point total before the new courses are added.
Weighted and unweighted grade scales
An unweighted scale commonly tops out at 4.0. Some schools add points for honors, Advanced Placement, International Baccalaureate, or other advanced courses. The exact boost and maximum GPA vary by institution.
Use the scale from the official transcript or student handbook. A 4.3, 5.0, or percentage-based system should not be forced into a generic 4.0 model without an approved conversion.
How to use this cumulative & weighted gpa calculator
- Enter each course's credit value and letter grade.
- Choose a weighting boost only when it matches the school's policy.
- Optionally add prior GPA and completed credits for a cumulative result.
Formula and method
The default letter scale uses A+ 4.3, A 4.0, A− 3.7 through F 0. School scales and honors policies vary.
Cumulative GPA example
A student has a 3.20 GPA across 30 completed credits, equal to 96 quality points. In the next term, the student earns 3.7 in a three-credit course and 3.0 in another three-credit course, adding 20.1 quality points.
The new cumulative GPA is 116.1 quality points divided by 36 credits, or about 3.225. The displayed result may round to 3.23, while the institution may retain more decimals internally.
Common mistakes to avoid
- Averaging course letter grades without weighting by credits.
- Including withdrawn or pass/fail courses that the school excludes from GPA.
- Applying an honors boost that differs from the institution's policy.
- Rounding each course's quality points before totaling them.
Accuracy and practical limits
The arithmetic is accurate for the selected grade values, credits, and boosts. Transcript rules for repeated courses, transfer credit, plus/minus grades, pass/fail work, academic forgiveness, and rounding vary, so the registrar's GPA remains authoritative.
Method basis: Standard mathematical definitions and the assumptions stated above. See our editorial and testing standards.
Frequently asked questions
Can a weighted GPA exceed 4.0?
Yes. A selected course boost is added to its grade points, so advanced courses can lift the weighted average above 4.0.
How do I combine a prior GPA?
Enter both prior GPA and prior credits; the calculator reconstructs prior quality points before combining them.
Do pass/fail courses count?
They are not included in this version because institutions handle them differently.