There are two different GPA calculators, the Current GPA calculator and the Future GPA calculator.

The Current GPA calculator can be used to predict the GPA of the current semester by entering the predictive GPA of each individual course. (This calendar is known to be easier to use than the Future GPA calculator.)

The Future GPA calculator can be used to predict the GPA of current and future semesters by entering the predictive GPA of the entire semester.