Sleep Cycle Calculator
🌙 Recommended Bedtimes (Includes 15 min to fall asleep)
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Esta herramienta proporciona información general y no sustituye el asesoramiento, diagnóstico o tratamiento médico profesional. Consulte siempre a un profesional de la salud cualificado.
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Preguntas Frecuentes
How long is a natural human sleep cycle?
An average human sleep cycle lasts approximately 90 minutes, progressing through NREM (light and deep sleep) into REM (rapid eye movement) sleep.
Why do I feel groggy even after sleeping 8 or 9 hours?
Sleep inertia (grogginess) occurs when your alarm wakes you up in the middle of deep NREM sleep. Waking at the end of a completed 90-minute cycle leaves you feeling energized.
How many sleep cycles should I get per night?
Most healthy adults require 5 to 6 completed sleep cycles per night (7.5 to 9 hours of restorative sleep).
How long does it take the average person to fall asleep?
Sleep studies show the average person takes 14 to 20 minutes to fall asleep after getting into bed. This calculator adds 15 minutes to all recommended times.
Is sleeping 6 hours (4 cycles) sufficient?
While 6 hours completes 4 full sleep cycles, it is considered the minimum threshold for adults. Chronic 6-hour sleep can lead to cumulative sleep debt.
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