How many years of school to I have to go through in total if i want to become a Pediatrician

This can be an excellent and extremely rewarding profession. I believe you have made an excellent choice!

After high school, you need 4 years of undergraduate courses at a college or university (which will get you a BS, BA, or other Bachelor's degree). After completing college, you will need to attend 4 years of 

Medical School (which will get you an MD or DO degree). After this, you are a "general" doctor. Most of the time, these new doctors go on to learn a specialty in medicine, such as pediatrics. This entails at least 3 more years of "Residency" training (the first year of residency was formerly called an "Internship"). In the case of pediatrics, the training of residency is 3 years. After completing these 3 years, you are now a pediatrician and are "eligible" to become "certified" in pediatrics by passing a rigorous test that deals with medical conditions related to infants and children. This is the ultimate goal of a pediatrician's training.

Bottom line: 4 years college + 4 years medical school + 3 years of residency = 11 years (after high school).

check out this page for more info. http://www.yourpediatrician.com/BecomingAPed.htm