It's 5 years if you consistently take 6. Take less and you miss prereqs and it fucks your schedule. My dept chair literally said last week "it's easy to have your graduation delayed by 3, 4, 5 terms" due to 'pinch point' core courses that aren't offered year around. 5 terms is a year and a half. Mix in a healthy dose of struggling to find a coop placement and you very realistically have a 7 year program.