Or if you haven't graduated yet, how many years do you expect it to take?
It seems it has become quite rare to graduate in 4 years now-a-days. I know it's going to take me at least 5 (I'm in my 4th year now).
The first time I went to college it took me the exact time since I was going full time and I didn't change my major. The second time I went part-time in the evenings and it took me twice as long, but it was well worth it.