Calculate your GPA. This can be achieved by using a GPA calculator (back2college.com/gpa). Enter each class you have taken, how many credit hours the class awarded, and the grade you received in that class, then click "Calculate your GPA."
Go to the GPA-to-letter grade conversion chart. Find your GPA on the chart under the "GPA" column. If your GPA is not on the chart, round up or down to the number closest to your GPA.
Find the letter grade that corresponds to your GPA in the "Letter Grade" column. You can also view your overall percentage grade in the "Percentage" column.