By collective bargaining agreement, 39.82h/wk (or 10min and 12 sec less than 40h/wk.) However my contract does explicitly that überstunden (over hours) are expected.
Realistically, up at 5am most days, in front of computer by 5.15a, looking for other positions and grants (more resources), at work by 9a, leave between 7 and 8p. No counting the 44min round-trip subway ride and the 6min walk on both ends (1h total round-trip), roughly 14h/day x 5 = 70 hours/wk. Some work time on Sat/Sun is not common, therefore, roughly 80h/wk.
However, I get roughly unlimited holidays (34 days/year by law) + 12 government holidays. In addition, the university shuts down for two weeks where I can't work. So, officially, 46 days/year (9 weeks/year holiday), but, it's more like 10-11 weeks/year with extra days and university shutdowns. In addition, I probably travel to conferences 3-4x/year x 1 week each. So, I'm probably traveling, at least 13 weeks/year (or roughly 25% of the year).
Interesting to think about it that way.