In the United States, a bachelor's degree typically requires the completion of 120 credit hours. However, some institutions may require more or fewer credit hours depending on the specific degree program. For example, some engineering programs may require up to 135 credit hours, while some arts and sciences programs may only require 115 credit hours.
Most bachelor's degrees programs require students to complete 36-40 credit hours in their first year, and then 30 credit hours in each subsequent year. This varies from program to program and institution to institution, but it gives you a general idea of the time and dedication it takes to complete a bachelor's degree.