How many years is it to become a doctor?
Depends on what kind of doctor.
MD, medical doctor.
JD, Judicary doctor
PhD, doctor of philosphy
ED, doctor of engineering
For PhD in engineering and probably many other areas a PhD takes usually 4-5 years after your bachelors. Usually you are not required to get your masters before your PhD. I have seen some complete their PhD in 2.5 yrs and some take forever... like 8 yrs lol. its up to you how long it will take to finish.