Ohio State’s Bachelor of Science in Human Development and Family Science is a 120-credit-hour program. To get started with the online program, you’ll need at least 30 college credits, and you can apply up to 90 previously earned credits, such as those from an associate degree, toward your total. Your time to graduation depends on how many eligible credits you bring in and how many courses you take each semester. Most part-time students take about 6 credit hours per term, while full-time students typically take 12.