Usually between 6-8 hours which is not enough for me. I'm always dead when I'm at school during the 5th or 6th hour/class then I sometimes fall asleep in class. But on weekends I usually sleep like 8 hours or a little bit more. Sometimes 3-5 hours when I go to bed very late and I have to get up early. But like now I've slept 12 hours which is crazy.