Method guide
How GPA Is Calculated
GPA is commonly calculated as a credit-weighted average of grade points. The exact grades and courses that count depend on the institution.
Start with grade points
A letter grade is mapped to a numeric grade-point value. A 4.0-style scale often places A near 4 points and F at 0, but plus/minus values and A+ treatment differ between schools. GPA Calculator exposes every value so the scale can be matched to the policy you actually use.
What credits mean in GPA calculation
Credits are the weight. Multiply a course's grade points by its GPA-counted credits to get quality points. A 4-credit course therefore contributes more to the weighted average than a 1-credit course with the same grade.
quality points = grade points × course credits
Calculate semester GPA
Add the exact quality points for all included courses, add their GPA-counted credits, then divide.
semester GPA = total quality points ÷ total GPA-counted credits
Example: an A worth 4.00 points over 3 credits contributes 12 quality points. A B worth 3.00 over 3 credits contributes 9. Together, 21 quality points divided by 6 credits gives a semester GPA of 3.500.
Calculate cumulative GPA
Convert the prior cumulative GPA back to prior quality points by multiplying it by completed GPA credits. Add the new semester's exact quality points and credits, then divide the combined totals.
updated cumulative GPA = ((prior GPA × prior GPA credits) + semester quality points) ÷ (prior GPA credits + semester GPA-counted credits)
A prior 3.250 GPA over 40 credits represents 130 prior quality points. Add a 3.500 semester over 12 credits, or 42 quality points, and 172 ÷ 52 gives 3.308 after final rounding to three decimals.
Why your transcript can differ
Registrars can differ on plus/minus grades, A+, pass/fail courses, withdrawals, incompletes, repeated courses, transfer work, attempted versus earned credits, and rounding. The calculator performs the arithmetic you configure; it does not decide which institutional policy applies to you.
Sources and official records
The credit-weighted method is described by university registrar/catalog guidance including The University of Texas at Austin and Penn State. Your current registrar or transcript remains the authority for an official GPA.