<p>If you have two semesters students generally take any where from 12 to 18 credit hours each semseter. A class that meets 3 hours total a week is generally 3 credit hours. Some classes will be worth 4 credits and you will spend about 4 hrs. a week in that classroom. Some classes can be two credits and you will spend 2 hrs. a week in that classroom. SO if you sign up for 15 credit hours total you can expect to spend 15 hrs a week in classes. Most teachers expect that studying and homework will use up 2 hrs of your free time for every credit the class is worth. So for a normal 3 credit course you are expected to study another 6 hrs during the week on that subject.</p>