How to Calculate Your Semester Average
- 1). Check your school's system for calculating your semester average to determine how many points each letter grade converts to. Most schools give four points for an "A," three points for a "B," two points for a "C," one point for a "D" and zero points for an "F." Some schools add 0.33 points for a "+" and subtract 0.33 for a "-" so an "A-" would be 3.67.
- 2). Convert each of your letter grades to a numerical value based on your school's GPA system. For example, using the standard GPA system, if you had an "A-," a "B+," a "C" and a "C-," you would convert those to 3.67, 3.33, 2 and 1.67.
- 3). Multiply the numerical value of each grade by the number of credits each class was worth. Continuing the example, if your first two classes were four credits each and your last two were three credits each, you would multiply 3.67 by 4, 3.33 by 4, 2 by 3 and 1.67 by 3 to get 14.68, 13.32, 6 and 5.01.
- 4). Add the values from Step 3 to calculate your total points earned for the semester. In this example, you would add 14.68, 13.32, 6 and 5.01 to get 39.01.
- 5). Divide the result from Step 4 by the number of credits you took for the semester to calculate your semester average. For this example, you would divide 39.01 by 14 (two four-credit classes and two three-credit classes) to find your semester average would be about 2.79.
Source...