How do I calculate my major GPA?

For each course, multiply the number of course units times the numeric equivalent of the grade. Divide this number by the total number of course units. The numeric equivalents: A=4.0, B=3.0, C=2.0, D=1.0, F=0.0. For “+” or “-“, add or subtract 0.3, except for an A+, which equals 4.0.