* Credit hours per semester/term: Colleges typically have different structures. Some might require 30 credit hours per year, while others might require more or less. A full-time student usually takes around 15 credit hours per semester.
* Course intensity: Some courses require more time commitment than others. A lab science course will likely demand more hours than a general education lecture.
* Student's learning pace and study habits: Some students learn faster and require less study time than others. Effective study habits significantly impact the total hours needed.
* Part-time vs. full-time enrollment: Part-time students will take longer to complete their degree and thus accumulate more total hours spent studying over time.
While a 2-year degree generally requires around 60-64 semester credit hours, translating that into total hours spent studying is impossible without making significant assumptions about the above factors. A rough estimate might be between 1,500 and 3,000 hours total, but this is a very broad range.