My name is Mary Allen and I am an enrollment Counselor with eCornell. I am often asked how much time does it take to complete a Cornell University Certificate online. Most courses are 2 or 4 weeks in length and your average weekly time commitment is around 3-6 hours per week. Very Manageable. I have earned 3 certificates from Cornell University online. I gave up TV in the evenings (Okay I did not give up my Thursday Night TV) 🙂 and I also did the courses on the weekends. Some students are even allowed to do the courses at work. How cool is that? Depending on the number of courses in a certificate program you can earn a certificate in just a few months time.