Grade point average, or GPA, is normally calculated on a scale from zero to 4.0, which is the highest. On the GPA scale, a grade of A is equal to 4.0, a B is 3.0, a C is 2.0, a D is 1.0 and an F is zero.
GPA is determined by calculating the average of all grades received. For instance, two A's and two B's would provide a GPA of 3.5. The GPA system is the standard used by most colleges and universities in the United States, as well as many high schools. While some schools use the basic scale listed above, others use a slightly more complicated scale based on exact percentage points instead of overall letter grade. In this type of scale, an A- grade of 90 to 92 percent equals a 3.7, while a B+ grade of 87 to 89 percent equals a 3.3.