In many educational institutions, a "C" is considered "average." In some graduate schools, "C" is the lowest possible passing grade. "C" is equivalent to a numerical grade in the low 70s. On a 4.0 scale, which is often used in colleges and universities, a "C" is typically around a 2.0.
A "C" is significantly lower than the top grade, an "A," which is given for outstanding work. An "A" translates to about 92 percent or greater, and it is at the top of the 4.0 scale. A "B" registers at 3.0 and indicates about 82 percent or higher. However, a "D" is only around 62 percent or 1.0.
Letter grades often have slight variations of "pluses" and "minuses." A plus sign attached to a grade adds a few points, while a minus subtracts the same amount. In addition, an "H" connected to a grade shows that it is for an Honors course.
Certain schools have other grading systems. Sometimes these are used only in select courses. For example, a student earns either an "S," for satisfactory or a "U," for unsatisfactory, with no numbers or other letters attached. Some classes are offered on a Pass/Fail basis. These designations indicate that the requirements have or have not been fulfilled.