How long are college classes?

College courses can vary in length depending on the number of credits and how many days a week the class is held. Usually, some classes will run an hour and 15 minutes and meet twice a week. Some classes might be three hours long and meet once a week, while some may be as short as 50 minutes and meet three times a week. Lab classes and discussion classes will vary in length depending on the subject and number of credits they provide; they are usually between 2 and 4 hours long.