( ? ) About
The human body cycles through 2 phases of sleep, rapid eye movement (REM) and nonrapid eye movement (NREM) sleep. The body cycles approximately 4 to 6 times each night, with each averaging 90 minutes. [1]
Waking up at the end of a cycle, when sleep is the lightest, often helps a person start the day feeling more well-rested.
Use this calculator to help choose a bed time or wake time.
5:30am on Thursday
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WAKE UP | SLEEP FOR | ||
Thursday at | 2:30pm | 9h (6 Cycles) | ██████ |
Thursday at | 1:00pm | 7h30m (5 Cycles) | █████▒ |
Thursday at | 11:30am | 6h (4 Cycles) | ████▒▒ |
Thursday at | 10:00am | 4h30m (3 Cycles) | ███▒▒▒ |