FAQs
A typical sleep cycle lasts about 90 minutes and consists of various stages, including light sleep (NREM stages 1 and 2), deep sleep (NREM stage 3), and REM sleep. These cycles repeat throughout the night.
Most adults need around 5 to 6 sleep cycles per night, equating to about 7.5 to 9 hours of sleep. However, individual needs may vary depending on genetics and lifestyle(Sleepopolis)(Omni Calculator).
The sleep calculator estimates the best times to wake up or go to sleep based on your desired wake-up time and typical sleep cycle length. This helps ensure you wake up at the end of a full sleep cycle, which can reduce grogginess and help you feel more refreshed(Sleepopolis)(Omni Calculator).
Waking up in the middle of a cycle, especially during deep sleep (NREM stage 3) or REM sleep, can cause grogginess, disorientation, and decreased mental performance upon waking(Omni Calculator).
To optimize sleep, use the calculator to ensure you complete full cycles by adjusting your bedtime or wake-up time. You should also maintain a consistent sleep schedule, practice good sleep hygiene, and ensure you get at least 4 to 6 cycles of sleep per night(Sleepopolis)(Omni Calculator).