This can really depend on how many classes you take per term. Usually it takes 4 years, but if you take for example 12 credits per term, it could take you about 4.5 years maybe even 5. However, as long as you go at your own pace and feel comfortable, you should be just fine!
Best of luck!
For you, the defining time is the study you major in, life situations that affect your time/money and motivation, and the goals you set for yourself.