What's the right way to count your hours of sleep?

Question

I'm a little confused. Okay so lets say i fell asleep at 11:00 and woke up at 7:00, would that be 9 hours of sleep?

Answer 1

There are 24 hours in a day. After midnight (12:00) it changes to 1:00.

So from 11:00 to 12:00 is one hour of sleep, and 12:00 to 7:00 is 7 hours of sleep. One plus seven is eight total hours of sleep.