Academic grading in the United States
Rank-based grading
A = 4 B = 3 C = 2 D = 1 F = 0 This allows grades to be easily averaged. Additionally, many schools add .33 for a + grade and subtract .33 for a − grade. Thus, a B+ yields a 3.33 whereas an A– yields a 3.67. A+s, if given, are usually assigned a value of 4.0 (equivalent to an A) due to the common assumption that a 4.00 is the best possible grade-point average, although 4.33 is awarded at some institutions. In some places, .25 or .3 instead of .33 is added for a + grade and subtracted for a − grade. Other institutions maintain a mid-grade and award .5 for the grade. For example, an AB would receive a 3.5-grade point and a BC would receive a 2.5-grade point.
Academic grading in the United States-18