<p>I have advised many Ph.D. students in Physics at IIT and, as noted above, the official time limit is 7 years but it is always possible to petition to extend. My students have ranged from 5-7 years after the B.S. degree. I remember that when I was in graduate school at UCSD, the nominal time to degree for physics was about 6.5 years after the B.S. Engineering is more or less the same.</p>
<p>The Masters degree takes about 1.5-2.0 years for a coursework-only degree. A thesis-based degree might take up to a year longer. however, there is really no reason to do a Masters thesis and then a Ph.D. thesis at the same university.</p>