How to calculate semester hours, well 1 class a semester equals credit hours for example if you've taken 3 course each 3 credits, your total semester hours would be 9. For more info please visit www.answer.yahoo.com
Each class you take will be worth a certain number of semester hours. Look at your schools registration page, and each class will have a number of hours listen for it. If you are taking 12 hours each semester or more, you are a full time student.