Identify the scale to use to calculate your GPA. For example, some engineering colleges assess a "B+," "B," or "B-" all as equivalent to a 3.0 on a 4.0 scale, while other schools use pluses and minuses and assess a "B+" as a 3.3, a "B" as a 3.0, and a "B-" as a 2.7. Your institution's registrar's office can help you determine the proper scale to use.
Determine which classes should be included in this GPA. Classes taken on a pass/fail or credit/no credit basis are typically not used to calculate GPA. For example, your major GPA includes all classes taken in your major area for a letter grade.
Multiply each applicable class's credits by the grade-point equivalent for the grade you received in the class to calculate each class's GPA points. For example, if you received a "B" in a 3-credit class with a scale in which a "B" is equivalent to a 3.0, multiply 3.0 times 3 to calculate 9.0 GPA points for the class.
Sum the GPA points for all applicable classes to calculate your total GPA points.
Add the total number of credits received in the applicable classes.
Divide your total GPA points by the total number of credits received to determine your GPA.