What’s the minimum amount of sleep i can get and still not be tired the next day?

I don't have a lot of time for sleeep tonight.

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Answer:
8 hours is the suggested length of a night's sleep for best performance. You can miss out on a few hours one night, however this creates a “sleep debt”. You would then have to sleep longer the next few days to repay the sleep debt.

Operating on a system where you keep accumulating but not repaying a sleep debt causes you to be exhausted, have difficulty concentrating and poor performance during the day.

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Answer:
90 minutes equals one cycle of sleep, so 90 minutes
but to not be tired, you should get 2 cycles, which equals 3 hrs

do not make it a habit though, bc its not good for you

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Answer:
It honestly depends from person to person, from night to night. I'd state try to get 3 hours, minimum.

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Answer:
4 hours is enough
i work in a call center and 4 hours works for me

nothing beats night sleep though