Usually between 7-8 hours.
I get up for work at 7:30 (but my alarm goes off at 7:00 so I can hit the snooze a few times because I am horrible about getting myself out of bed), and hubby and I usually hit the hay around 11 pm. I'm almost always asleep by midnight.
On weekends, we still usually never stay up any later than one, and I still wake up before 8:30 usually. It's rare if I sleep until nine.
This is hilarious and shocking to those who knew me in college, where I'd stay up until at least 2 am, even if I had an 8 am class, and on weekends I'd consider it an accomplishment if I was awake before noon (awake, not out of bed or dressed...the laptop was right next to my bed, after all! 😛). On weekends I usually went to sleep when the birds started singing, and slept from about 6 am to noon.
I just can't do that sort of thing to my body anymore. It likes a regular sleep pattern or it refuses to function.