Free Online Test Prep. SAT Prep : Practice tests and information for students taking the SAT test. Cracking the AP World History Exam, 2010 Edition (College Test Preparation) (9780375429538): Princeton… Calculate Your GPA. How to Calculate Your Grade Point Average (GPA) Your grade point average (GPA) is calculated by dividing the total amount of grade points earned by the total amount of credit hours attempted. Your grade point average may range from 0.0 to a 4.0. For example: A = 4.00 grade points A- = 3.70 grade points B+ = 3.33 grade pointsB = 3.00 grade points B- = 2.70 grade points C+ = 2.30 grade pointsC = 2.00 grade points C- = 1.70 grade points D+ = 1.30 grade pointsD = 1.00 grade points D- = 0.70 grade points.