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How To Calculate GPA

The words grade, point and average give you a clue as to how you calculate your grade point average (GPA). First you have to determine your grade points, and then you take an average. Every letter grade has a numerical value assigned to it: A=4; B=3; C=2; D=1; F=0.

To calculate your grade points for a class you have taken, multiply the numerical value of your letter grade by the credit hours assigned to the course. Example: You took English 101, which is three credit hours, and you earned a C in the course (Remember, C=2). Just multiply 2 (for the C) x 3 (credit hours). That is, 2 x 3 = 6. So, for this class, you have six grade points.

Now calculate the grade points for each class using the example below:

Course Credits Grade Earned Grade Value Grade Points
ENG-101 3 C 2 3 x 2 = 6
CHM-110 4 A 4 4 x 4 = 16
PSY-201 3 B 3 3 x 3 = 9
Total Credits and Grade Points 10 31

Once you have figured out your grade points you can compute the average. To compute the grade point average:       

  1. Total your grade points by adding the grade points from each class: 6+16+9=31        
  2. Total the number of credits attempted: 3+4+3=10                
  3. Divide the total grade points by the total number of credits: 31 divided by 10 = 3.1                

The grade point average, or GPA, in this case is 3.1 for the semester. You have three different GPAs.

  1. Semester GPA - specific to all courses taken during the semester
  2. Cumulative GPA - includes all coursework completed at TTC
  3. Program GPA - specific to coursework applying directly toward your program of study.             

Grading System

Letter Grade Numerical Scale
A 91-100
B 81-90
C 71-80
D 65-70
F Below 65