how long does it take to do a phd
As stated above, the PhD can take up to 8 years, with the average time being around 5 years. But it does vary considerably depending on a lot of factors (subject, research, supervisor, funding, problems...). As of 2007, the average length for a PhD was 8.2 years.n the humanities, it's typically over 5 years for a PhD. UPenn, for example, allots up to 10 years for the student to complete the PhD in psychology. Do grad school in the west coast, UC system is pretty great.