The mathematical impact of future grades depends on how many credit hours you have already completed. Early in your degree (freshman/sophomore years), each A has a significant upward pull. Later in your degree, more credits are required to produce large shifts.

Your semester (or term) GPA is calculated using only the quality points and credits earned within that specific grading period. Your cumulative GPA combines all graded credit hours completed to date: total cumulative quality points divided by total cumulative credits. An exceptional semester GPA pulls your cumulative GPA upward, but its impact lessens as your total completed credits increase.

If you earn a 4.00 in a 6-credit summer session and a 3.00 in a 15-credit fall semester, the simple average is 3.50. However, the true credit-weighted cumulative GPA is $(6 \times 4.00 + 15 \times 3.00) / 21 = 3.29$. Each semester must be weighted by its completed credit hours.

In your freshman year with 15 completed credits, another 15-credit semester accounts for 50% of your total GPA. By senior year with 105 completed credits, a 15-credit semester represents only 12.5% of your total record, requiring exceptional grades to produce modest cumulative changes.

When transferring credits between institutions, accepted courses typically appear on your new transcript with transfer credits awarded, but previous letter grades are not averaged into your new university institutional GPA. However, graduate school applications (like AMCAS or LSAC) recalculate an all-inclusive cumulative GPA across all institutions attended.