<p>I took Calc BC senior year of high school, got a 5, and thought I would never need to take math again. I changed to a chemistry major sophomore year, which requires Calc 3. Since I’m not very good at remembering what I learn in math, I took the AP credit for Calc 1, then took Calc 2 (essentially repeating the BC material). It was a tough class, but it refreshed my memory and got me back on track. Last semester, I took Calc 3. The Calc 3 material is generally looked at as somewhat easier than that for Calc 2. I would say if you are very comfortable with what you learned in AP Calc BC, then you should be fine to go straight into Calc 3. But like the poster above me said, you should definitely talk this over with your advisor.</p>