<p>Anywhere between 14 and 16 is a normal courseload. People who don’t have lab courses (or the more rare 1 or 2 hour courses) generally take 15 hours, or 5 classes. For science students, it’s a little harder to hit the magic number of 15. 14 hours (two lab courses and two three-hour courses) is farily common, but it’s not uncommon to take 15 hours (three four-hour courses and one three-hour course) or 16 hours (four four-hour courses.</p>