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Grade Point Average (GPA) is a numerical representation of a student's academic performance, calculated by assigning a point value to each grade and averaging these values. Typically, an A is worth 4.0 points, a B is worth 3.0 points, and other grades have corresponding values. The GPA is calculated by dividing the total grade points earned by the total number of credit hours attempted.

Changing a grade from B to A affects the overall GPA by increasing the total grade points earned. This change alters the numerator in the GPA calculation, potentially raising the average if the course has a significant weight in the total credit hours. Understanding how each grade contributes to the GPA is crucial for accurately determining the new average after a grade change.

GPA can be calculated as either weighted or unweighted. An unweighted GPA treats all courses equally, while a weighted GPA gives additional points for advanced courses (like honors or AP classes). Knowing whether the GPA in question is weighted or unweighted is essential for accurately calculating the new average after a grade change, as it influences the overall point distribution.