Choose by the record you actually have
Use the general GPA tool when you already have numeric grade points and credits for every included course. Use College GPA when some rows should be excluded, such as a pass/fail course that your institution does not count. Semester GPA also asks about remaining credits and a target, so it can answer a planning question. CGPA combines a previous cumulative GPA and previous included credits with a new course list. These tasks share a weighted-mean formula, but they should not share an identical list of inputs.
Before calculating, identify whether a transcript’s credit total includes transfer or pass/fail credits that do not contribute quality points. Dividing by every earned credit can understate GPA when the institution excludes some credits. Conversely, removing the credit hours of a low grade without also removing its quality points produces an inflated result. A course inclusion flag is an arithmetic instruction, not an official determination of which course should be excluded.
Why a four-credit course counts more
Multiply each course’s grade points by its included credits to obtain quality points. Four credits at 3.0 contribute 12 quality points; two credits at 4.0 contribute 8. Their GPA is (12 + 8) / (4 + 2) = 3.3333, displayed as 3.33 when rounded to two decimal places. The unweighted average, 3.50, answers a different question because it gives the two courses equal influence. Keep intermediate quality points unrounded and round only the final displayed GPA.
The same reasoning explains why the GPA scale must be stated. A numerical value of 4.0 can be the maximum on one scale or a below-maximum grade on another. Grade percentages are also not grade points: entering 85 as a grade point on a 4.0 scale is not a percentage-to-GPA conversion. If you have letter grades or percentages, obtain the institution’s conversion first. There is no universally valid straight-line conversion for all schools.
Combine prior and new credits without averaging averages
Suppose the prior record is 3.20 across 30 included credits, and the new term is 3.80 across 15. Prior quality points are 96 and new quality points are 57. The combined GPA is 153 / 45 = 3.40, not the simple average of 3.20 and 3.80, which is 3.50. This example assumes the previous GPA is sufficiently precise and that the included credits follow the same institutional rule.
A displayed prior GPA may already be rounded. Multiplying that rounded value by credits reconstructs an estimate, not necessarily the exact quality-point total recorded by the registrar. For an official result, use transcript quality points when available and confirm repeat-course replacement rules. These tools do not silently replace an earlier attempt or decide whether transfer work belongs in the local GPA.
Read a semester target as a feasibility check
For a completed 3.0 GPA over 12 credits, a target of 3.5 after six more credits requires (3.5 × 18 − 3.0 × 12) / 6 = 4.5 on the remaining work. On a 4.0 scale, that target is outside the modeled range. The result is useful precisely because it preserves the infeasible value rather than clipping it to 4.0. A lower target or more remaining credits changes the planning problem.
The calculation assumes the listed remaining credits will all contribute to GPA and that their weighted average can be represented by one value. It does not predict future grades, scholarship eligibility, honors, academic standing or admission. Review a requirement with the relevant institution, then use the calculator to explore the arithmetic under that stated requirement.
Questions before you calculate
Can I enter percentages instead of grade points?
Only after applying the grade-point conversion used by your institution. A percentage is a score out of 100, whereas GPA uses a separate grade-point scale. Treating them as the same number produces a result with the wrong meaning.
Does a zero-credit course lower GPA?
A row with zero included credits contributes neither quality points nor denominator weight. The total included credit weight must still be positive for a GPA to exist. This arithmetic behavior does not determine how a school treats a non-credit course.
Why can the required remaining GPA exceed the scale?
The target may be infeasible given the completed record and remaining credits. Keeping the calculated requirement visible lets you see that constraint. It is not a promise that extra credit, grade replacement or an alternative grading policy will be available.